Replace with immutable map to avoid heavy cloning

1 files changed, 27 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index f93f11a82..7f329c4db 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -485,6 +485,16 @@ dependencies = [
 ]
 
 [[package]]
+name = "im"
+version = "13.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sized-chunks 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "indexmap"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1006,6 +1016,7 @@ dependencies = [
  "chalk-rust-ir 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
  "chalk-solve 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
  "ena 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "im 13.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "insta 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lalrpop-intern 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1551,6 +1562,14 @@ dependencies = [
 ]
 
 [[package]]
+name = "sized-chunks"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "slab"
 version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1685,6 +1704,11 @@ dependencies = [
 ]
 
 [[package]]
+name = "typenum"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "unicase"
 version = "2.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1893,6 +1917,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum globset 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "925aa2cac82d8834e2b2a4415b6f6879757fb5c0928fc445ae76461a12eed8f2"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum idna 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "02e2673c30ee86b5b96a9cb52ad15718aa1f966f5ab9ad54a8b95d5ca33120a9"
+"checksum im 13.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8db49f8bc08d5cc4e2bb0f7d25a6d1db2c79bc6f7d7c86c96c657eb3d214125f"
 "checksum indexmap 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a4d6d89e0948bf10c08b9ecc8ac5b83f07f857ebe2c0cbe38de15b4e4f510356"
 "checksum indicatif 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2c60da1c9abea75996b70a931bba6c750730399005b61ccd853cee50ef3d0d0c"
 "checksum inotify 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "40b54539f3910d6f84fbf9a643efd6e3aa6e4f001426c0329576128255994718"
@@ -1987,6 +2012,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)" = "051c49229f282f7c6f3813f8286cc1e3323e8051823fce42c7ea80fe13521704"
 "checksum serde_repr 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "cd02c7587ec314570041b2754829f84d873ced14a96d1fd1823531e11db40573"
 "checksum serde_yaml 0.8.9 (registry+https://github.com/rust-lang/crates.io-index)" = "38b08a9a90e5260fe01c6480ec7c811606df6d3a660415808c3c3fa8ed95b582"
+"checksum sized-chunks 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f01db57d7ee89c8e053245deb77040a6cc8508311f381c88749c33d4b9b78785"
 "checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 "checksum smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ab606a9c5e214920bb66c458cd7be8ef094f813f20fe77a54cc7dbfff220d4b7"
 "checksum smol_str 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "590700be3630457c56f8c73c0ea39881476ad7076cd84057d44f4f38f79914fb"
@@ -2002,6 +2028,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "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 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
+"checksum typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
 "checksum unicase 2.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2e2e6bd1e59e56598518beb94fd6db628ded570326f0a98c679a304bd9f00150"
 "checksum unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
 "checksum unicode-normalization 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "141339a08b982d942be2ca06ff8b076563cbe223d1befd5450716790d44e2426"