7 files changed, 69 insertions, 381 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 1ee2df8dd..127d7772a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -123,11 +123,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "cast"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "cc"
 version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -170,51 +165,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "criterion"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "criterion-plot 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "criterion-stats 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "csv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "handlebars 0.32.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools-num 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "criterion-plot"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "criterion-stats"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "thread-scoped 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "crossbeam-channel"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -284,23 +234,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "csv"
-version = "1.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "csv-core 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "csv-core"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "derive-new"
 version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -436,21 +369,6 @@ version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "handlebars"
-version = "0.32.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "pest 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "pest_derive 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "heck"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -501,14 +419,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "itertools-num"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "itoa"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -688,11 +598,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pest"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "pest"
 version = "2.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -701,16 +606,6 @@ dependencies = [
 
 [[package]]
 name = "pest_derive"
-version = "1.0.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "pest 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
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-
-[[package]]
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 dependencies = [
@@ -772,11 +667,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "quote"
-version = "0.3.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "quote"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -831,15 +721,11 @@ dependencies = [
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 version = "0.1.0"
 dependencies = [
- "criterion 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "join_to_string 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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  "ra_text_edit 0.1.0",
- "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_xorshift 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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  "test_utils 0.1.0",
@@ -1241,16 +1127,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "simplelog"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "term 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
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-
-[[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1291,16 +1167,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "0.11.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
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-
-[[package]]
-name = "syn"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -1320,14 +1186,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "synom"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
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@@ -1392,15 +1250,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "term"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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-
-[[package]]
 name = "termion"
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@@ -1437,11 +1286,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "thread-scoped"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "thread_local"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1571,11 +1415,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicode-xid"
-version = "0.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "unicode-xid"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
@@ -1688,15 +1527,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum byte-tools 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "560c32574a12a89ecd91f5e742165893f86e3ab98d21f8ea548658eb9eef5f40"
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 "checksum cargo_metadata 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "e5d1b4d380e1bab994591a24c2bdd1b054f64b60bef483a8c598c7c345bc3bbe"
-"checksum cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "926013f2860c46252efceabb19f4a6b308197505082c609025aa6706c011d427"
 "checksum cc 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)" = "155ed195f7bd722d1dfeb30365b9d0c1f6a078fa7ca4014497e5935d90993d6f"
 "checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
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@@ -1704,8 +1539,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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-"checksum csv-core 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fa5cdef62f37e6ffe7d1f07a381bc0db32b7a3ff1cac0de56cb0d81e71f53d65"
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-"checksum handlebars 0.32.4 (registry+https://github.com/rust-lang/crates.io-index)" = "d89ec99d1594f285d4590fc32bac5f75cdab383f1123d504d27862c644a807dd"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum humansize 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b6cab2627acfc432780848602f3f558f7e9dd427352224b0d9324025796d2a5e"
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@@ -1731,7 +1563,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum im 12.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ae9c7f9bb8aee47fc16d535a705f7867a9fc83bb822e5e1043bb98e77ffeed3c"
 "checksum indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7e81a7c05f79578dbc15793d8b619db9ba32b4577003ef3af1a91c416798c58d"
 "checksum itertools 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)" = "0d47946d458e94a1b7bcabbf6521ea7c037062c81f534615abcad76e84d4970d"
-"checksum itertools-num 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a872a22f9e6f7521ca557660adb96dd830e54f0f490fa115bb55dd69d38b27e7"
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
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@@ -1755,16 +1586,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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 "checksum rand 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8356f47b32624fef5b3301c1be97e5944ecdd595409cc5da11d05f211db6cfbd"
 "checksum rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e464cd887e869cddcae8792a4ee31d23c7edd516700695608f5b98c67ee0131c"
@@ -1801,27 +1629,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde_derive 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)" = "96a7f9496ac65a2db5929afa087b54f8fc5008dcfbe48a8874ed20049b0d6154"
 "checksum serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)" = "c37ccd6be3ed1fdf419ee848f7c758eb31b054d7cd3ae3600e3bae0adf569811"
 "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
-"checksum simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e95345f185d5adeb8ec93459d2dc99654e294cc6ccf5b75414d8ea262de9a13"
 "checksum slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b3bc762e6a4b6c6fcaade73e77f9ebc6991b676f88bb2358bddb56560f073373"
 "checksum smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "b73ea3738b47563803ef814925e69be00799a8c07420be8b996f8e98fb2336db"
 "checksum smol_str 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "486a74e9b9fc53373808f7a17e10fc728adcb1fbe272292271d8bea61175e181"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
 "checksum superslice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b50b13d42370e0f5fc62eafdd5c2d20065eaf5458dab215ff3e20e63eea96b30"
-"checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
 "checksum syn 0.15.23 (registry+https://github.com/rust-lang/crates.io-index)" = "9545a6a093a3f0bd59adb472700acc08cad3776f860f16a897dfce8c88721cbc"
-"checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
 "checksum tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
 "checksum tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "7e91405c14320e5c79b3d148e1c86f40749a36e490642202a31689cb1a3452b2"
 "checksum tera 0.11.20 (registry+https://github.com/rust-lang/crates.io-index)" = "4b505279e19d8f7d24b1a9dc58327c9c36174b1a2c7ebdeac70792d017cb64f3"
 "checksum teraron 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0d89ad4617d1dec55331067fadaa041e813479e1779616f3d3ce9308bf46184e"
-"checksum term 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5e6b677dd1e8214ea1ef4297f85dbcbed8e8cdddb561040cc998ca2551c37561"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum text_unit 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "8009d7bdbd896a7e09b595f8f9325a19047fc708653e60d0895202b82135048f"
 "checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
-"checksum thread-scoped 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bcbb6aa301e5d3b0b5ef639c9a9c7e2f1c944f177b460c04dc24c69b1fa2bd99"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
 "checksum threadpool 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e2f0c90a5f3459330ac8bc0d2f879c693bb7a2f59689c1083fc4ef83834da865"
 "checksum time 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "847da467bf0db05882a9e2375934a8a55cffdc9db0d128af1518200260ba1f6c"
@@ -1838,7 +1661,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum unicode-normalization 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "6a0180bc61fc5a987082bfa111f4cc95c4caff7f9799f3e46df09163a937aa25"
 "checksum unicode-segmentation 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "aa6024fc12ddfd1c6dbc14a80fa2324d4568849869b779f6bd37e5e4c03344d1"
 "checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
-"checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
 "checksum url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dd4e7c0d531266369519a4aa4f399d748bd37043b00bde1e4ff1f60a120b355a"
diff --git a/crates/ra_editor/Cargo.toml b/crates/ra_editor/Cargo.toml
index 7ed7526ec..1ad99af28 100644
--- a/crates/ra_editor/Cargo.toml
+++ b/crates/ra_editor/Cargo.toml
@@ -18,15 +18,3 @@ proptest = "0.8.7"
 
 [dev-dependencies]
 test_utils = { path = "../test_utils" }
-criterion = "0.2"
-rand = "*"
-rand_xorshift = "*"
-lazy_static = "*"
-
-[lib]
-# so that criterion arguments work, see: https://bheisler.github.io/criterion.rs/book/faq.html#cargo-bench-gives-unrecognized-option-errors-for-valid-command-line-options
-bench = false
-
-[[bench]]
-name = "translate_offset_with_edit_benchmark"
-harness = false
\ No newline at end of file
diff --git a/crates/ra_editor/benches/translate_offset_with_edit_benchmark.rs b/crates/ra_editor/benches/translate_offset_with_edit_benchmark.rs
deleted file mode 100644
index 0f550fd39..000000000
--- a/crates/ra_editor/benches/translate_offset_with_edit_benchmark.rs
+++ /dev/null
@@ -1,87 +0,0 @@
-use criterion::{criterion_group, criterion_main};
-use criterion::Criterion;
-use criterion::Fun;
-use ra_text_edit::AtomTextEdit;
-use ra_text_edit::test_utils::{arb_edits_custom, arb_offset};
-use ra_editor::line_index_utils;
-use ra_editor::LineIndex;
-use ra_syntax::TextUnit;
-use proptest::test_runner;
-use proptest::string::string_regex;
-use proptest::strategy::{Strategy, ValueTree};
-use rand_xorshift::XorShiftRng;
-use rand::SeedableRng;
-use lazy_static::lazy_static;
-
-#[derive(Debug)]
-struct Data {
-    text: String,
-    line_index: LineIndex,
-    edits: Vec<AtomTextEdit>,
-    offset: TextUnit,
-}
-
-fn setup_data() -> Data {
-    let mut runner = test_runner::TestRunner::default();
-    {
-        struct TestRng {
-            rng: XorShiftRng,
-        }
-        // HACK to be able to manually seed the TestRunner
-        let rng: &mut TestRng = unsafe { std::mem::transmute(runner.rng()) };
-        rng.rng = XorShiftRng::seed_from_u64(0);
-    }
-
-    let text = {
-        let arb = string_regex("([a-zA-Z_0-9]{10,50}.{1,5}\n){100,500}").unwrap();
-        let tree = arb.new_tree(&mut runner).unwrap();
-        tree.current()
-    };
-
-    let edits = {
-        let arb = arb_edits_custom(&text, 99, 100);
-        let tree = arb.new_tree(&mut runner).unwrap();
-        tree.current()
-    };
-
-    let offset = {
-        let arb = arb_offset(&text);
-        let tree = arb.new_tree(&mut runner).unwrap();
-        tree.current()
-    };
-
-    let line_index = LineIndex::new(&text);
-
-    Data {
-        text,
-        line_index,
-        edits,
-        offset,
-    }
-}
-
-lazy_static! {
-    static ref DATA: Data = setup_data();
-}
-
-fn compare_translates(c: &mut Criterion) {
-    let functions = vec![
-        Fun::new("translate_after_edit", |b, _| {
-            b.iter(|| {
-                let d = &*DATA;
-                line_index_utils::translate_after_edit(&d.text, d.offset, d.edits.clone());
-            })
-        }),
-        Fun::new("translate_offset_with_edit", |b, _| {
-            b.iter(|| {
-                let d = &*DATA;
-                line_index_utils::translate_offset_with_edit(&d.line_index, d.offset, &d.edits);
-            })
-        }),
-    ];
-
-    c.bench_functions("translate", functions, ());
-}
-
-criterion_group!(benches, compare_translates);
-criterion_main!(benches);
diff --git a/crates/ra_editor/src/line_index.rs b/crates/ra_editor/src/line_index.rs
index 5304fbcf6..898fee7e0 100644
--- a/crates/ra_editor/src/line_index.rs
+++ b/crates/ra_editor/src/line_index.rs
@@ -128,8 +128,8 @@ impl LineIndex {
     }
 }
 
+#[cfg(test)]
 /// Simple reference implementation to use in proptests
-/// and benchmarks as baseline
 pub fn to_line_col(text: &str, offset: TextUnit) -> LineCol {
     let mut res = LineCol {
         line: 0,
@@ -270,6 +270,27 @@ mod test_line_index {
             .boxed()
     }
 
+    fn to_line_col(text: &str, offset: TextUnit) -> LineCol {
+        let mut res = LineCol {
+            line: 0,
+            col_utf16: 0,
+        };
+        for (i, c) in text.char_indices() {
+            if i + c.len_utf8() > offset.to_usize() {
+                // if it's an invalid offset, inside a multibyte char
+                // return as if it was at the start of the char
+                break;
+            }
+            if c == '\n' {
+                res.line += 1;
+                res.col_utf16 = 0;
+            } else {
+                res.col_utf16 += 1;
+            }
+        }
+        res
+    }
+
     proptest! {
         #[test]
         fn test_line_index_proptest((offset, text) in arb_text_with_offset()) {
diff --git a/crates/ra_editor/src/line_index_utils.rs b/crates/ra_editor/src/line_index_utils.rs
index ba3ac8aeb..b8b149442 100644
--- a/crates/ra_editor/src/line_index_utils.rs
+++ b/crates/ra_editor/src/line_index_utils.rs
@@ -1,6 +1,6 @@
 use ra_text_edit::AtomTextEdit;
 use ra_syntax::{TextUnit, TextRange};
-use crate::{LineIndex, LineCol, line_index::{self, Utf16Char}};
+use crate::{LineIndex, LineCol, line_index::Utf16Char};
 use superslice::Ext;
 
 #[derive(Debug, Clone)]
@@ -325,59 +325,34 @@ pub fn translate_offset_with_edit(
     res.to_line_col(offset)
 }
 
-/// Simplest implementation to use as reference in proptest and benchmarks
-pub fn translate_after_edit(
-    pre_edit_text: &str,
-    offset: TextUnit,
-    edits: Vec<AtomTextEdit>,
-) -> LineCol {
-    let text = edit_text(pre_edit_text, edits);
-    line_index::to_line_col(&text, offset)
-}
-
-fn edit_text(pre_edit_text: &str, mut edits: Vec<AtomTextEdit>) -> String {
-    // apply edits ordered from last to first
-    // since they should not overlap we can just use start()
-    edits.sort_by_key(|x| -(x.delete.start().to_usize() as isize));
-
-    let mut text = pre_edit_text.to_owned();
-
-    for edit in &edits {
-        let range = edit.delete.start().to_usize()..edit.delete.end().to_usize();
-        text.replace_range(range, &edit.insert);
-    }
-
-    text
-}
-
 #[cfg(test)]
 mod test {
     use super::*;
     use proptest::{prelude::*, proptest, proptest_helper};
-    use ra_text_edit::test_utils::{arb_text, arb_offset, arb_edits};
+    use crate::line_index;
+    use ra_text_edit::test_utils::{arb_offset, arb_text_with_edits};
+    use ra_text_edit::TextEdit;
 
     #[derive(Debug)]
     struct ArbTextWithOffsetAndEdits {
         text: String,
+        edits: TextEdit,
         edited_text: String,
         offset: TextUnit,
-        edits: Vec<AtomTextEdit>,
     }
 
-    fn arb_text_with_offset_and_edits() -> BoxedStrategy<ArbTextWithOffsetAndEdits> {
-        arb_text()
-            .prop_flat_map(|text| {
-                (arb_edits(&text), Just(text)).prop_flat_map(|(edits, text)| {
-                    let edited_text = edit_text(&text, edits.clone());
-                    let arb_offset = arb_offset(&edited_text);
-                    (Just(text), Just(edited_text), Just(edits), arb_offset).prop_map(
-                        |(text, edited_text, edits, offset)| ArbTextWithOffsetAndEdits {
-                            text,
-                            edits,
-                            edited_text,
-                            offset,
-                        },
-                    )
+    fn arb_text_with_edits_and_offset() -> BoxedStrategy<ArbTextWithOffsetAndEdits> {
+        arb_text_with_edits()
+            .prop_flat_map(|x| {
+                let edited_text = x.edits.apply(&x.text);
+                let arb_offset = arb_offset(&edited_text);
+                (Just(x), Just(edited_text), arb_offset).prop_map(|(x, edited_text, offset)| {
+                    ArbTextWithOffsetAndEdits {
+                        text: x.text,
+                        edits: x.edits,
+                        edited_text,
+                        offset,
+                    }
                 })
             })
             .boxed()
@@ -385,10 +360,10 @@ mod test {
 
     proptest! {
         #[test]
-        fn test_translate_offset_with_edit(x in arb_text_with_offset_and_edits()) {
+        fn test_translate_offset_with_edit(x in arb_text_with_edits_and_offset()) {
             let expected = line_index::to_line_col(&x.edited_text, x.offset);
             let line_index = LineIndex::new(&x.text);
-            let actual = translate_offset_with_edit(&line_index, x.offset, &x.edits);
+            let actual = translate_offset_with_edit(&line_index, x.offset, x.edits.as_atoms());
 
             assert_eq!(actual, expected);
         }
diff --git a/crates/ra_text_edit/src/test_utils.rs b/crates/ra_text_edit/src/test_utils.rs
index f150288f6..f0b8dfde1 100644
--- a/crates/ra_text_edit/src/test_utils.rs
+++ b/crates/ra_text_edit/src/test_utils.rs
@@ -1,6 +1,6 @@
 use proptest::prelude::*;
 use text_unit::{TextUnit, TextRange};
-use crate::AtomTextEdit;
+use crate::{AtomTextEdit, TextEdit};
 
 pub fn arb_text() -> proptest::string::RegexGeneratorStrategy<String> {
     // generate multiple newlines
@@ -23,11 +23,7 @@ pub fn arb_offset(text: &str) -> BoxedStrategy<TextUnit> {
     }
 }
 
-pub fn arb_edits(text: &str) -> BoxedStrategy<Vec<AtomTextEdit>> {
-    arb_edits_custom(&text, 0, 7)
-}
-
-pub fn arb_edits_custom(text: &str, min: usize, max: usize) -> BoxedStrategy<Vec<AtomTextEdit>> {
+pub fn arb_text_edit(text: &str) -> BoxedStrategy<TextEdit> {
     if text.is_empty() {
         // only valid edits
         return Just(vec![])
@@ -37,14 +33,14 @@ pub fn arb_edits_custom(text: &str, min: usize, max: usize) -> BoxedStrategy<Vec
                     .prop_map(|text| vec![AtomTextEdit::insert(TextUnit::from(0), text)])
                     .boxed(),
             )
+            .prop_map(TextEdit::from_atoms)
             .boxed();
     }
 
     let offsets = text_offsets(text);
-    let max_cuts = max.min(offsets.len());
-    let min_cuts = min.min(offsets.len() - 1);
+    let max_cuts = 7.min(offsets.len());
 
-    proptest::sample::subsequence(offsets, min_cuts..max_cuts)
+    proptest::sample::subsequence(offsets, 0..max_cuts)
         .prop_flat_map(|cuts| {
             let strategies: Vec<_> = cuts
                 .chunks(2)
@@ -68,52 +64,22 @@ pub fn arb_edits_custom(text: &str, min: usize, max: usize) -> BoxedStrategy<Vec
                 .collect();
             strategies
         })
+        .prop_map(TextEdit::from_atoms)
         .boxed()
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use proptest::{proptest, proptest_helper};
-
-    fn arb_text_with_edits() -> BoxedStrategy<(String, Vec<AtomTextEdit>)> {
-        let text = arb_text();
-        text.prop_flat_map(|s| {
-            let edits = arb_edits(&s);
-            (Just(s), edits)
-        })
-        .boxed()
-    }
-
-    fn intersect(r1: TextRange, r2: TextRange) -> Option<TextRange> {
-        let start = r1.start().max(r2.start());
-        let end = r1.end().min(r2.end());
-        if start <= end {
-            Some(TextRange::from_to(start, end))
-        } else {
-            None
-        }
-    }
-    proptest! {
-        #[test]
-        fn atom_text_edits_are_valid((text, edits) in arb_text_with_edits()) {
-            proptest_atom_text_edits_are_valid(text, edits)
-        }
-    }
+#[derive(Debug, Clone)]
+pub struct ArbTextWithEdits {
+    pub text: String,
+    pub edits: TextEdit,
+}
 
-    fn proptest_atom_text_edits_are_valid(text: String, edits: Vec<AtomTextEdit>) {
-        // slicing doesn't panic
-        for e in &edits {
-            let _ = &text[e.delete];
-        }
-        // ranges do not overlap
-        for i in 1..edits.len() {
-            let e1 = &edits[i];
-            for e2 in &edits[0..i] {
-                if intersect(e1.delete, e2.delete).is_some() {
-                    assert!(false, "Overlapping ranges {} {}", e1.delete, e2.delete);
-                }
-            }
-        }
-    }
+pub fn arb_text_with_edits() -> BoxedStrategy<ArbTextWithEdits> {
+    let text = arb_text();
+    text.prop_flat_map(|s| {
+        let edits = arb_text_edit(&s);
+        (Just(s), edits)
+    })
+    .prop_map(|(text, edits)| ArbTextWithEdits { text, edits })
+    .boxed()
 }
diff --git a/crates/ra_text_edit/src/text_edit.rs b/crates/ra_text_edit/src/text_edit.rs
index 392968d63..0881f3e1c 100644
--- a/crates/ra_text_edit/src/text_edit.rs
+++ b/crates/ra_text_edit/src/text_edit.rs
@@ -26,12 +26,7 @@ impl TextEditBuilder {
         self.atoms.push(AtomTextEdit::insert(offset, text))
     }
     pub fn finish(self) -> TextEdit {
-        let mut atoms = self.atoms;
-        atoms.sort_by_key(|a| (a.delete.start(), a.delete.end()));
-        for (a1, a2) in atoms.iter().zip(atoms.iter().skip(1)) {
-            assert!(a1.delete.end() <= a2.delete.start())
-        }
-        TextEdit { atoms }
+        TextEdit::from_atoms(self.atoms)
     }
     pub fn invalidates_offset(&self, offset: TextUnit) -> bool {
         self.atoms
@@ -41,6 +36,14 @@ impl TextEditBuilder {
 }
 
 impl TextEdit {
+    pub(crate) fn from_atoms(mut atoms: Vec<AtomTextEdit>) -> TextEdit {
+        atoms.sort_by_key(|a| (a.delete.start(), a.delete.end()));
+        for (a1, a2) in atoms.iter().zip(atoms.iter().skip(1)) {
+            assert!(a1.delete.end() <= a2.delete.start())
+        }
+        TextEdit { atoms }
+    }
+
     pub fn as_atoms(&self) -> &[AtomTextEdit] {
         &self.atoms
     }