perf(transform-imports): Remove needless allocations (#398)

Author: kdy1

Cargo.lock

@@ -1,5 +1,11 @@
 # @swc/plugin-transform-imports
 
+## 6.2.0
+
+### Minor Changes
+
+- 8bade7e: Improve performance
+
 ## 6.1.0
 
 ### Minor Changes

packages/transform-imports/CHANGELOG.md

@@ -18,6 +18,12 @@
 
 # @swc/plugin-transform-imports
 
+## 6.2.0
+
+### Minor Changes
+
+- 8bade7e: Improve performance
+
 ## 6.1.0
 
 ### Minor Changes

packages/transform-imports/README.md

@@ -1,6 +1,6 @@
 {
   "name": "@swc/plugin-transform-imports",
-  "version": "6.1.0",
+  "version": "6.2.0",
   "description": "SWC plugin for https://www.npmjs.com/package/babel-plugin-transform-imports",
   "main": "swc_plugin_transform_imports.wasm",
   "scripts": {

packages/transform-imports/package.json

@@ -11,7 +11,7 @@ homepage     = { workspace = true }
 license      = { workspace = true }
 repository   = { workspace = true }
 rust-version = { workspace = true }
-version      = "0.71.0"
+version      = "0.72.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -20,7 +20,7 @@ convert_case   = { workspace = true }
 handlebars     = { workspace = true }
 once_cell      = { workspace = true }
 regex          = { workspace = true }
-serde          = { workspace = true }
+serde          = { workspace = true, features = ["rc"] }
 swc_atoms      = { workspace = true }
 swc_cached     = { workspace = true }
 swc_common     = { workspace = true }

packages/transform-imports/transform/Cargo.toml

@@ -1,4 +1,4 @@
-use std::{borrow::Cow, collections::HashMap};
+use std::{borrow::Cow, collections::HashMap, sync::Arc};
 
 use convert_case::{Case, Casing};
 use handlebars::{Context, Handlebars, Helper, HelperResult, Output, RenderContext};
@@ -16,7 +16,7 @@ static DUP_SLASH_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"//").unwrap());
 #[derive(Clone, Debug, Deserialize)]
 #[serde(transparent)]
 pub struct Config {
-    pub packages: HashMap<String, PackageConfig>,
+    pub packages: HashMap<String, Arc<PackageConfig>>,
 }
 
 #[derive(Clone, Debug, Deserialize)]

packages/transform-imports/transform/src/lib.rs

@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::{path::PathBuf, sync::Arc};
 
 use modularize_imports::{modularize_imports, PackageConfig};
 use swc_ecma_parser::{EsSyntax, Syntax};
@@ -106,6 +106,7 @@ fn modularize_imports_fixture(input: PathBuf) {
             ),
         ]
         .into_iter()
+        .map(|(k, v)| (k, Arc::new(v)))
         .collect(),
     };