8 files changed, 117 insertions, 18 deletions

diff --git a/Cargo.lock b/Cargo.lock
index b4e82be..e23afee 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -124,6 +124,40 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "328b822bdcba4d4e402be8d9adb6eebf269f969f8eadef977a553ff3c4fbcb58"
 
 [[package]]
+name = "crossbeam-channel"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e54ea8bc3fb1ee042f5aace6e3c6e025d3874866da222930f70ce62aceba0bfa"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6455c0ca19f0d2fbf751b908d5c55c1f5cbc65e03c4225427254b46890bdde1e"
+dependencies = [
+ "cfg-if",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c00d6d2ea26e8b151d99093005cb442fb9a37aeaca582a03ec70946f49ab5ed9"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+ "lazy_static",
+ "memoffset",
+ "scopeguard",
+]
+
+[[package]]
 name = "crossbeam-utils"
 version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -140,6 +174,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56899898ce76aaf4a0f24d914c97ea6ed976d42fec6ad33fcbb0a1103e07b2b0"
 
 [[package]]
+name = "either"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
+
+[[package]]
 name = "encode_unicode"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -323,6 +363,16 @@ dependencies = [
 ]
 
 [[package]]
+name = "num_cpus"
+version = "1.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
+[[package]]
 name = "once_cell"
 version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -380,6 +430,31 @@ dependencies = [
 ]
 
 [[package]]
+name = "rayon"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c06aca804d41dbc8ba42dfd964f0d01334eceb64314b9ecf7c5fad5188a06d90"
+dependencies = [
+ "autocfg",
+ "crossbeam-deque",
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d78120e2c850279833f1dd3582f730c4ab53ed95aeaaaa862a2a5c71b1656d8e"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-deque",
+ "crossbeam-utils",
+ "lazy_static",
+ "num_cpus",
+]
+
+[[package]]
 name = "regex"
 version = "1.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -442,6 +517,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
 name = "serde"
 version = "1.0.130"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -514,6 +595,7 @@ dependencies = [
  "ignore",
  "insta",
  "lib",
+ "rayon",
  "rnix",
  "serde",
  "serde_json",
@@ -672,6 +754,7 @@ name = "vfs"
 version = "0.0.0"
 dependencies = [
  "indexmap",
+ "rayon",
 ]
 
 [[package]]
diff --git a/bin/Cargo.toml b/bin/Cargo.toml
index bf39a3a..715e466 100644
--- a/bin/Cargo.toml
+++ b/bin/Cargo.toml
@@ -16,14 +16,15 @@ path = "src/main.rs"
 
 [dependencies]
 ariadne = "0.1.3"
-rnix = "0.10.1"
 clap = "3.0.0-beta.4"
 ignore = "0.4.18"
-thiserror = "1.0.30"
-similar = "2.1.0"
-vfs = { path = "../vfs" }
 lib = { path = "../lib" }
+rayon = "1.5.1"
+rnix = "0.10.1"
+similar = "2.1.0"
+thiserror = "1.0.30"
 toml = "0.5.8"
+vfs = { path = "../vfs" }
 
 [dependencies.serde]
 version = "1.0.68"
diff --git a/bin/src/lint.rs b/bin/src/lint.rs
index 23a1d10..e1544e1 100644
--- a/bin/src/lint.rs
+++ b/bin/src/lint.rs
@@ -50,6 +50,7 @@ pub mod main {
     };
 
     use lib::session::SessionInfo;
+    use rayon::prelude::*;
 
     pub fn main(check_config: CheckConfig) -> Result<(), StatixErr> {
         let vfs = check_config.vfs()?;
@@ -59,9 +60,13 @@ pub mod main {
         let version = conf_file.version()?;
         let session = SessionInfo::from_version(version);
         let lint = |vfs_entry| lint_with(vfs_entry, &lints, &session);
-        let results = vfs.iter().map(lint).collect::<Vec<_>>();
+        let results = vfs
+            .par_iter()
+            .map(lint)
+            .filter(|lr| !lr.reports.is_empty())
+            .collect::<Vec<_>>();
 
-        if results.iter().map(|r| r.reports.len()).sum::<usize>() != 0 {
+        if results.len() != 0 {
             for r in &results {
                 stdout.write(&r, &vfs, check_config.format).unwrap();
             }
diff --git a/flake.lock b/flake.lock
index 1e575e3..a7c083f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -8,11 +8,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1642141613,
-        "narHash": "sha256-WFS7T5oOLD8anu/77iz7EPz7zQsJZtP5qVa5485k3dI=",
+        "lastModified": 1645251813,
+        "narHash": "sha256-cQ66tGjnZclBCS3nD26mZ5fUH+3/HnysGffBiWXUSHk=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "d75ffc9f1d3b60bb597e48ae01f486a6de27d30e",
+        "rev": "9892337b588c38ec59466a1c89befce464aae7f8",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1642069818,
-        "narHash": "sha256-666w6j8wl/bojfgpp0k58/UJ5rbrdYFbI2RFT2BXbSQ=",
+        "lastModified": 1645013224,
+        "narHash": "sha256-b7OEC8vwzJv3rsz9pwnTX2LQDkeOWz2DbKypkVvNHXc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "46821ea01c8f54d2a20f5a503809abfc605269d7",
+        "rev": "b66b39216b1fef2d8c33cc7a5c72d8da80b79970",
         "type": "github"
       },
       "original": {
@@ -67,11 +67,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1642101527,
-        "narHash": "sha256-C4zcaWULWlrirpEt/pA85CCMBt+7SWZweMaMJ7EvrXw=",
+        "lastModified": 1645205556,
+        "narHash": "sha256-e4lZW3qRyOEJ+vLKFQP7m2Dxh5P44NrnekZYLxlucww=",
         "owner": "rust-analyzer",
         "repo": "rust-analyzer",
-        "rev": "b4c31481a554d0132003228ba319bd9476fe85ae",
+        "rev": "acf5874b39f3dc5262317a6074d9fc7285081161",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 9bb9332..f6099e0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -33,9 +33,9 @@
         });
 
       chanspec = {
-        date = "2021-12-01";
+        date = "2022-02-06";
         channel = "nightly";
-        sha256 = "DhIP1w63/hMbWlgElJGBumEK/ExFWCdLaeBV5F8uWHc="; # set zeros after modifying channel or date
+        sha256 = "oKkTWopCDx4tphzTtRn+zDDtvmIZrL/H44tV2ruSfDw="; # set zeros after modifying channel or date
       };
       rustChannel = p: (fenix.overlay p p).fenix.toolchainOf chanspec;
 
diff --git a/lib/src/lib.rs b/lib/src/lib.rs
index cc4818a..8c05706 100644
--- a/lib/src/lib.rs
+++ b/lib/src/lib.rs
@@ -201,6 +201,8 @@ impl Suggestion {
     }
 }
 
+unsafe impl Send for Suggestion {}
+
 #[cfg(feature = "json-out")]
 impl Serialize for Suggestion {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
diff --git a/vfs/Cargo.toml b/vfs/Cargo.toml
index 7a5dc6b..d1d654c 100644
--- a/vfs/Cargo.toml
+++ b/vfs/Cargo.toml
@@ -6,4 +6,4 @@ license = "MIT"
 
 [dependencies]
 indexmap = "1.6.2"
-
+rayon = "1.5.1"
diff --git a/vfs/src/lib.rs b/vfs/src/lib.rs
index cd6cc03..2d7577d 100644
--- a/vfs/src/lib.rs
+++ b/vfs/src/lib.rs
@@ -5,6 +5,7 @@ use std::{
 };
 
 use indexmap::IndexSet;
+use rayon::prelude::*;
 
 #[derive(Copy, Clone, Debug, PartialEq, PartialOrd, Eq, Ord, Hash)]
 pub struct FileId(pub u32);
@@ -70,6 +71,13 @@ impl ReadOnlyVfs {
             contents: self.get_str(*file_id),
         })
     }
+    pub fn par_iter(&self) -> impl ParallelIterator<Item = VfsEntry> {
+        self.data.par_iter().map(move |(file_id, _)| VfsEntry {
+            file_id: *file_id,
+            file_path: self.file_path(*file_id),
+            contents: self.get_str(*file_id),
+        })
+    }
 }
 
 pub struct VfsEntry<'ρ> {