perf(ast-tools): use FxHashMap over std::collections::HashMap

crates/oxc_language_server/src/main.rs

@@ -1,3 +1,4 @@
+#[allow(clippy::disallowed_types)]
 mod linter;
 
 use std::{collections::HashMap, fmt::Debug, path::PathBuf, str::FromStr};

tasks/ast_tools/Cargo.toml

@@ -22,6 +22,7 @@ prettyplease = { workspace = true }
 proc-macro2 = { workspace = true }
 quote = { workspace = true }
 regex = { workspace = true }
+rustc-hash = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
 syn = { workspace = true, features = ["clone-impls", "derive", "extra-traits", "full", "parsing", "printing", "proc-macro"] }

tasks/ast_tools/src/codegen.rs

@@ -1,7 +1,8 @@
-use std::{cell::RefCell, collections::HashMap, path::PathBuf};
+use std::{cell::RefCell, path::PathBuf};
 
 use itertools::Itertools;
 use proc_macro2::TokenStream;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 
 use crate::{
     derives::{Derive, DeriveOutput},
@@ -69,7 +70,7 @@ pub trait Runner {
 
 pub struct EarlyCtx {
     ty_table: Vec<AstRef>,
-    ident_table: HashMap<String, TypeId>,
+    ident_table: FxHashMap<String, TypeId>,
     mods: RefCell<Vec<rust_ast::Module>>,
 }
 
@@ -80,7 +81,7 @@ impl EarlyCtx {
         let adts = mods.iter().flat_map(|it| it.items.iter());
 
         let mut ty_table = Vec::with_capacity(len);
-        let mut ident_table = HashMap::with_capacity(len);
+        let mut ident_table = FxHashMap::with_capacity_and_hasher(len, FxBuildHasher);
         for adt in adts {
             if let Some(ident) = adt.borrow().ident() {
                 let ident = ident.to_string();

tasks/ast_tools/src/derives/mod.rs

@@ -77,10 +77,11 @@ macro_rules! define_derive {
             }
 
             fn run(&mut self, ctx: &$crate::codegen::LateCtx) -> $crate::Result<Self::Output> {
-                use std::collections::{HashMap, HashSet};
+                use std::collections::{HashSet};
                 use std::vec::Vec;
                 use convert_case::{Case, Casing};
                 use itertools::Itertools;
+                use rustc_hash::FxHashMap;
 
                 use $crate::derives::DeriveTemplate;
 
@@ -90,7 +91,7 @@ macro_rules! define_derive {
                     .into_iter()
                     .filter(|def| def.generates_derive(trait_name))
                     .map(|def| (def, self.derive(def, ctx)))
-                    .fold(HashMap::<&str, (HashSet<&str>, Vec<TokenStream>)>::new(), |mut acc, (def, stream)| {
+                    .fold(FxHashMap::<&str, (HashSet<&str>, Vec<TokenStream>)>::default(), |mut acc, (def, stream)| {
                         let module_path = def.module_path();
                         let krate = module_path.split("::").next().unwrap();
                         if !acc.contains_key(krate) {

tasks/ast_tools/src/generators/ast_builder.rs

@@ -1,10 +1,11 @@
-use std::{borrow::Cow, collections::HashMap, stringify};
+use std::{borrow::Cow, stringify};
 
 use convert_case::{Case, Casing};
 use itertools::Itertools;
 use lazy_static::lazy_static;
 use proc_macro2::TokenStream;
 use quote::{format_ident, quote, ToTokens};
+use rustc_hash::FxHashMap;
 use syn::{parse_quote, Ident, Type};
 
 use super::define_generator;
@@ -226,7 +227,7 @@ fn default_init_field(field: &FieldDef) -> bool {
         };
     }
     lazy_static! {
-        static ref DEFAULT_FIELDS: HashMap<&'static str, &'static str> = HashMap::from([
+        static ref DEFAULT_FIELDS: FxHashMap<&'static str, &'static str> = FxHashMap::from_iter([
             field!(scope_id: Cell<Option<ScopeId>>),
             field!(symbol_id: Cell<Option<SymbolId>>),
             field!(reference_id: Cell<Option<ReferenceId>>),

tasks/ast_tools/src/generators/visit.rs

@@ -1,9 +1,10 @@
-use std::{borrow::Cow, collections::HashMap};
+use std::borrow::Cow;
 
 use convert_case::{Case, Casing};
 use itertools::Itertools;
 use proc_macro2::TokenStream;
 use quote::{format_ident, quote, ToTokens};
+use rustc_hash::FxHashMap;
 use syn::{parse_quote, Ident};
 
 use super::define_generator;
@@ -135,12 +136,12 @@ struct VisitBuilder<'a> {
 
     visits: Vec<TokenStream>,
     walks: Vec<TokenStream>,
-    cache: HashMap<Ident, [Option<Cow<'a, Ident>>; 2]>,
+    cache: FxHashMap<Ident, [Option<Cow<'a, Ident>>; 2]>,
 }
 
 impl<'a> VisitBuilder<'a> {
     fn new(ctx: &'a LateCtx, is_mut: bool) -> Self {
-        Self { ctx, is_mut, visits: Vec::new(), walks: Vec::new(), cache: HashMap::new() }
+        Self { ctx, is_mut, visits: Vec::new(), walks: Vec::new(), cache: FxHashMap::default() }
     }
 
     fn build(mut self) -> (/* visits */ Vec<TokenStream>, /* walks */ Vec<TokenStream>) {

tasks/ast_tools/src/passes/calc_layout.rs

@@ -1,8 +1,7 @@
-use std::collections::HashMap;
-
 use itertools::Itertools;
 use lazy_static::lazy_static;
 use quote::ToTokens;
+use rustc_hash::FxHashMap;
 use syn::Type;
 
 use super::{define_pass, Pass};
@@ -18,7 +17,7 @@ use crate::{
 #[cfg(not(target_pointer_width = "64"))]
 compile_error!("This module only supports 64bit architectures.");
 
-type WellKnown = HashMap<&'static str, PlatformLayout>;
+type WellKnown = FxHashMap<&'static str, PlatformLayout>;
 
 define_pass! {
     pub struct CalcLayout;
@@ -279,7 +278,7 @@ fn calc_type_layout(ty: &TypeAnalysis, ctx: &EarlyCtx) -> Result<PlatformLayout>
 
 macro_rules! well_known {
     ($($typ:ty: { $($platform:tt => $layout:expr,)*},)*) => {
-        WellKnown::from([
+        FxHashMap::from_iter([
             $((
                 stringify!($typ),
                 well_known!(@ $( $platform => $layout,)*)

tasks/coverage/Cargo.toml

@@ -35,6 +35,7 @@ phf = { workspace = true, features = ["macros"] }
 pico-args = { workspace = true }
 rayon = { workspace = true }
 regex = { workspace = true }
+rustc-hash = { workspace = true }
 saphyr = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }

tasks/coverage/src/typescript/meta.rs

@@ -1,6 +1,7 @@
 //! <https://github.com/microsoft/TypeScript/blob/6f06eb1b27a6495b209e8be79036f3b2ea92cd0b/src/harness/harnessIO.ts#L1237>
 
-use std::{collections::HashMap, fs, path::Path, sync::Arc};
+use rustc_hash::FxHashMap;
+use std::{fs, path::Path, sync::Arc};
 
 use oxc::{
     allocator::Allocator,
@@ -35,7 +36,7 @@ pub struct CompilerSettings {
 }
 
 impl CompilerSettings {
-    pub fn new(options: &HashMap<String, String>) -> Self {
+    pub fn new(options: &FxHashMap<String, String>) -> Self {
         Self {
             modules: Self::split_value_options(options.get("module")),
             targets: Self::split_value_options(options.get("target")),
@@ -93,7 +94,7 @@ impl TestCaseContent {
     /// These files start with `// @<option-name>: <option-value>` and are followed by the file's content.
     /// This function extracts the individual files with their content and drops unsupported files.
     pub fn make_units_from_test(path: &Path, code: &str) -> Self {
-        let mut current_file_options: HashMap<String, String> = HashMap::default();
+        let mut current_file_options: FxHashMap<String, String> = FxHashMap::default();
         let mut current_file_name: Option<String> = None;
         let mut test_unit_data: Vec<TestUnitData> = vec![];
         let mut current_file_content = String::new();

tasks/javascript_globals/Cargo.toml

@@ -18,4 +18,5 @@ handlebars = { workspace = true }
 oxc_tasks_common = { workspace = true }
 
 lazy_static = { workspace = true }
+rustc-hash = { workspace = true }
 serde = { workspace = true, features = ["derive"] }

tasks/javascript_globals/src/main.rs

@@ -1,8 +1,7 @@
 #![allow(clippy::print_stdout, clippy::print_stderr)]
-use std::collections::HashMap;
-
 use lazy_static::lazy_static;
 use oxc_tasks_common::agent;
+use rustc_hash::FxHashMap;
 use serde::Serialize;
 mod template;
 
@@ -30,10 +29,10 @@ impl<'a> Context<'a> {
 }
 
 fn get_diff(
-    current: &HashMap<String, bool>,
-    prev: &HashMap<String, bool>,
-) -> HashMap<String, bool> {
-    let mut retv: HashMap<String, bool> = HashMap::new();
+    current: &FxHashMap<String, bool>,
+    prev: &FxHashMap<String, bool>,
+) -> FxHashMap<String, bool> {
+    let mut retv: FxHashMap<String, bool> = FxHashMap::default();
 
     for (key, value) in current {
         if !prev.contains_key(key) {
@@ -45,22 +44,22 @@ fn get_diff(
 }
 
 lazy_static! {
-    static ref NEW_GLOBALS_2017: HashMap<String, bool> = {
-        return HashMap::from([
+    static ref NEW_GLOBALS_2017: FxHashMap<String, bool> = {
+        return FxHashMap::from_iter([
             (String::from("Atomics"), false),
             (String::from("SharedArrayBuffer"), false),
         ]);
     };
-    static ref NEW_GLOBALS_2020: HashMap<String, bool> = {
-        return HashMap::from([
+    static ref NEW_GLOBALS_2020: FxHashMap<String, bool> = {
+        return FxHashMap::from_iter([
             (String::from("BigInt"), false),
             (String::from("BigInt64Array"), false),
             (String::from("BigUint64Array"), false),
             (String::from("globalThis"), false),
         ]);
     };
-    static ref NEW_GLOBALS_2021: HashMap<String, bool> = {
-        return HashMap::from([
+    static ref NEW_GLOBALS_2021: FxHashMap<String, bool> = {
+        return FxHashMap::from_iter([
             (String::from("AggregateError"), false),
             (String::from("FinalizationRegistry"), false),
             (String::from("WeakRef"), false),
@@ -73,8 +72,8 @@ fn main() {
     // A value of true indicates that the variable may be overwritten.
     // A value of false indicates that the variable should be considered read-only.
     // open globals.json file relative to current file
-    // let globals: HashMap<String, HashMap<String, bool>>;
-    let globals: HashMap<String, HashMap<String, bool>> = match agent()
+    // let globals: FxHashMap<String, FxHashMap<String, bool>>;
+    let globals: FxHashMap<String, FxHashMap<String, bool>> = match agent()
         .get("https://raw.githubusercontent.com/sindresorhus/globals/main/globals.json")
         .call()
     {
@@ -88,7 +87,7 @@ fn main() {
     let new_globals_2015 = get_diff(&globals["es2015"], &globals["es5"]);
 
     let new_globals_2015_2017 = {
-        let mut map = HashMap::new();
+        let mut map = FxHashMap::default();
         map.extend(new_globals_2015.clone());
         map.extend(NEW_GLOBALS_2017.clone());
         map
@@ -158,7 +157,7 @@ fn main() {
     }
 }
 
-fn to_env_vars(env_var_map: &HashMap<String, bool>) -> Vec<EnvVar> {
+fn to_env_vars(env_var_map: &FxHashMap<String, bool>) -> Vec<EnvVar> {
     let mut result: Vec<EnvVar> = vec![];
     for (key, value) in env_var_map {
         result.push(EnvVar { name: key, writeable: *value });

tasks/minsize/Cargo.toml

@@ -28,3 +28,4 @@ flate2 = { workspace = true }
 oxc_tasks_common = { workspace = true }
 
 humansize = { workspace = true }
+rustc-hash = { workspace = true }

tasks/minsize/src/lib.rs

@@ -1,6 +1,5 @@
 #![allow(clippy::print_stdout, clippy::print_stderr)]
 use std::{
-    collections::HashMap,
     fs::File,
     io::{self, Write},
 };
@@ -13,6 +12,7 @@ use oxc_minifier::{CompressOptions, Minifier, MinifierOptions};
 use oxc_parser::Parser;
 use oxc_span::SourceType;
 use oxc_tasks_common::{project_root, TestFile, TestFiles};
+use rustc_hash::FxHashMap;
 
 // #[test]
 // #[cfg(any(coverage, coverage_nightly))]
@@ -28,7 +28,7 @@ pub fn run() -> Result<(), io::Error> {
     let path = project_root().join("tasks/minsize/minsize.snap");
 
     // Data copied from https://github.com/privatenumber/minification-benchmarks
-    let targets = HashMap::<&str, &str>::from_iter([
+    let targets = FxHashMap::<&str, &str>::from_iter([
         ("react.development.js", "23.70 kB"),
         ("moment.js", "59.82 kB"),
         ("jquery.js", "90.07 kB"),
@@ -43,7 +43,7 @@ pub fn run() -> Result<(), io::Error> {
         ("typescript.js", "3.49 MB"),
     ]);
 
-    let gzip_targets = HashMap::<&str, &str>::from_iter([
+    let gzip_targets = FxHashMap::<&str, &str>::from_iter([
         ("react.development.js", "8.54 kB"),
         ("moment.js", "19.33 kB"),
         ("jquery.js", "31.95 kB"),

tasks/rulegen/Cargo.toml

@@ -24,5 +24,6 @@ convert_case = { workspace = true }
 handlebars = { workspace = true }
 lazy_static = { workspace = true }
 regex = { workspace = true }
+rustc-hash = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 ureq = { workspace = true }

tasks/rulegen/src/main.rs

@@ -1,7 +1,6 @@
 #![allow(clippy::print_stdout, clippy::print_stderr, clippy::disallowed_methods)]
 use std::{
     borrow::Cow,
-    collections::HashMap,
     fmt::{self, Display, Formatter},
 };
 
@@ -18,6 +17,7 @@ use oxc_ast::{
 };
 use oxc_parser::Parser;
 use oxc_span::{GetSpan, SourceType, Span};
+use rustc_hash::FxHashMap;
 use serde::Serialize;
 use ureq::Response;
 
@@ -381,7 +381,7 @@ struct State<'a> {
     source_text: &'a str,
     valid_tests: Vec<&'a Expression<'a>>,
     invalid_tests: Vec<&'a Expression<'a>>,
-    expression_to_group_comment_map: HashMap<Span, String>,
+    expression_to_group_comment_map: FxHashMap<Span, String>,
     group_comment_stack: Vec<String>,
 }
 
@@ -391,7 +391,7 @@ impl<'a> State<'a> {
             source_text,
             valid_tests: vec![],
             invalid_tests: vec![],
-            expression_to_group_comment_map: HashMap::new(),
+            expression_to_group_comment_map: FxHashMap::default(),
             group_comment_stack: vec![],
         }
     }