Set codegen-units = 1 (#266)

Use [`codegen-units =
1`](https://doc.rust-lang.org/rustc/codegen-options/index.html#codegen-units)
for better runtime performance.

Author: cijiugechu

.github/workflows/perfcheck.yml

@@ -55,34 +55,34 @@ jobs:
 
       - name: Build Yarn (base)
         working-directory: ../base
-        run: cargo build --release -p zpm --bin yarn-bin
+        run: cargo build --profile release-lto -p zpm --bin yarn-bin
 
       - name: Build Yarn (head)
         working-directory: ../head
-        run: cargo build --release -p zpm --bin yarn-bin
+        run: cargo build --profile release-lto -p zpm --bin yarn-bin
 
       - name: Start mock proxy
         working-directory: ../head
         run: |
-          ./target/release/yarn-bin debug mock-proxy -p 4873 https://registry.npmjs.org &
+          ./target/release-lto/yarn-bin debug mock-proxy -p 4873 https://registry.npmjs.org &
           echo "YARN_NPM_REGISTRY_SERVER=http://localhost:4873" >> $GITHUB_ENV
           echo "YARN_UNSAFE_HTTP_WHITELIST=localhost" >> $GITHUB_ENV
 
       - name: Run benchmark cold (base)
         working-directory: ../base
-        run: ./target/release/yarn-bin debug bench gatsby install-full-cold
+        run: ./target/release-lto/yarn-bin debug bench gatsby install-full-cold
 
       - name: Run benchmark cold (head)
         working-directory: ../head
-        run: ./target/release/yarn-bin debug bench gatsby install-full-cold
+        run: ./target/release-lto/yarn-bin debug bench gatsby install-full-cold
 
       - name: Run benchmark warm with lockfile (base)
         working-directory: ../base
-        run: ./target/release/yarn-bin debug bench gatsby install-cache-and-lock
+        run: ./target/release-lto/yarn-bin debug bench gatsby install-cache-and-lock
 
       - name: Run benchmark warm with lockfile (head)
         working-directory: ../head
-        run: ./target/release/yarn-bin debug bench gatsby install-cache-and-lock
+        run: ./target/release-lto/yarn-bin debug bench gatsby install-cache-and-lock
 
       - name: Generate benchmark comment
         uses: actions/github-script@v7

Cargo.toml

@@ -117,6 +117,7 @@ debug = true
 [profile.release-lto]
 inherits = "release"
 lto = true
+codegen-units = 1
 
 [profile.release-lto-nodebug]
 inherits = "release-lto"