chore: add await sync() benchmark

Author: sxzz

README.md

@@ -63,6 +63,9 @@ Run the following command to benchmark the performance of `quansync`:
 pnpm run build && pnpm run benchmark
 ```
 
+Benchmark results indicate that each `yield` incurs an overhead of
+approximately 150 ns, comparable to that of `await sync()`. (On Apple M1 Max)
+
 ## Build-time Macro
 
 If you don't like the `function*` and `yield*` syntax, we also provide a build-time macro via [unplugin-quansync](https://github.com/unplugin/unplugin-quansync#usage) allowing you use quansync with async/await syntax, while still able to get the sync version out of that.

scripts/benchmark.js

@@ -41,10 +41,13 @@ summary(() => {
   bench('sync: native add', function* () {
     yield () => do_not_optimize(addNativeSync(1))
   })
+  bench('sync: native await add', function* () {
+    yield async () => do_not_optimize(await addNativeSync(1))
+  })
   bench('sync: quansync add', function* () {
     yield () => do_not_optimize(quansyncAdd.sync(1))
   })
-  bench('sync: gensync add ', function* () {
+  bench('sync: gensync add', function* () {
     yield () => do_not_optimize(gensyncAdd.sync(1))
   })
 })
@@ -68,7 +71,7 @@ summary(() => {
   bench('async: quansync add', function* () {
     yield async () => do_not_optimize(await quansyncAdd.async(1))
   })
-  bench('async: gensync add ', function* () {
+  bench('async: gensync add', function* () {
     yield async () => do_not_optimize(await gensyncAdd.async(1))
   })
 })