chore(benchmark): add codegen benchmark (#4207)

.github/workflows/benchmark.yml

@@ -58,7 +58,7 @@ jobs:
           - isolated_declarations
           - semantic
           - minifier
-          - codegen_sourcemap
+          - codegen
           - sourcemap
 
     steps:

tasks/benchmark/Cargo.toml

@@ -39,7 +39,7 @@ name    = "linter"
 harness = false
 
 [[bench]]
-name    = "codegen_sourcemap"
+name    = "codegen"
 harness = false
 
 [[bench]]
@@ -112,7 +112,7 @@ parser = ["dep:oxc_allocator", "dep:oxc_parser", "dep:oxc_span", "dep:oxc_tasks_
 transformer = ["dep:oxc_allocator", "dep:oxc_parser", "dep:oxc_span", "dep:oxc_tasks_common", "dep:oxc_transformer"]
 semantic = ["dep:oxc_allocator", "dep:oxc_parser", "dep:oxc_semantic", "dep:oxc_span", "dep:oxc_tasks_common"]
 minifier = ["dep:oxc_allocator", "dep:oxc_minifier", "dep:oxc_parser", "dep:oxc_span", "dep:oxc_tasks_common"]
-codegen_sourcemap = ["dep:oxc_allocator", "dep:oxc_codegen", "dep:oxc_parser", "dep:oxc_span", "dep:oxc_tasks_common"]
+codegen = ["dep:oxc_allocator", "dep:oxc_codegen", "dep:oxc_parser", "dep:oxc_span", "dep:oxc_tasks_common"]
 sourcemap = [
   "dep:oxc_allocator",
   "dep:oxc_codegen",

tasks/benchmark/benches/codegen.rs

@@ -0,0 +1,33 @@
+use oxc_allocator::Allocator;
+use oxc_benchmark::{criterion_group, criterion_main, BenchmarkId, Criterion};
+use oxc_codegen::CodeGenerator;
+use oxc_parser::Parser;
+use oxc_span::SourceType;
+use oxc_tasks_common::TestFiles;
+
+fn bench_codegen(criterion: &mut Criterion) {
+    for file in TestFiles::complicated_one(0).files() {
+        let id = BenchmarkId::from_parameter(&file.file_name);
+        let source_type = SourceType::from_path(&file.file_name).unwrap();
+        let allocator = Allocator::default();
+        let source_text = &file.source_text;
+        let ret = Parser::new(&allocator, source_text, source_type).parse();
+
+        let mut group = criterion.benchmark_group("codegen");
+        group.bench_with_input(id.clone(), &ret.program, |b, program| {
+            b.iter_with_large_drop(|| CodeGenerator::new().build(program).source_map);
+        });
+        group.finish();
+
+        let mut group = criterion.benchmark_group("codegen_sourcemap");
+        group.bench_with_input(id, &ret.program, |b, program| {
+            b.iter_with_large_drop(|| {
+                CodeGenerator::new().enable_source_map(&file.file_name, source_text).build(program)
+            });
+        });
+        group.finish();
+    }
+}
+
+criterion_group!(codegen, bench_codegen);
+criterion_main!(codegen);