[Turbopack] avoid some allocations (#75285) #23869

Job	Run time
publish-turbopack-npm-packages	0s
deploy-target	15s
build-wasm (web)	3m 50s
build	2m 6s
build-wasm (nodejs)	3m 32s
stable - x86_64-apple-darwin - node@16	6m 30s
stable - aarch64-apple-darwin - node@16	6m 31s
stable - x86_64-pc-windows-msvc - node@16	16m 34s
stable - aarch64-pc-windows-msvc - node@16	12m 56s
stable - x86_64-unknown-linux-gnu - node@16	4m 22s
stable - x86_64-unknown-linux-musl - node@16	11m 2s
stable - aarch64-unknown-linux-gnu - node@16	4m 17s
stable - aarch64-unknown-linux-musl - node@16	10m 37s
Deploy examples	56s
Upload Turbopack Bytesize metrics to Datadog	27s
Deploy preview tarball	2m 29s
Potentially publish release	0s
Release Stats	0s
	1h 26m 24s

Provide feedback