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cmd/go: use cached copy instead of GOTMPDIR archive #81727
Description
The build process currently uses the package _pkg_.a from GOTMPDIR after building a package, even though a copy of the archive is already stored in GOCACHE at the end of buildObject. It can use the cached copy from GOCACHE instead.
When -work is not enabled, the GOTMPDIR copy is no longer needed and can be removed to reduce disk usage during compilation.
I have a fix for this issue and plan to open a CL for this change.
For example, my fix reduced peak disk usage during ./make.bash from 1.2 GB
to 657 MB.
Activity
gopherbot commentedon Sep 24, 2026
Change https://go.dev/cl/838145 mentions this issue:
cmd/go: use cached copy instead of GOTMPDIR archivegabyhelp commentedon Sep 24, 2026
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prattmic commentedon Sep 29, 2026
cc @golang/command-line
Dinichthys commentedon Oct 9, 2026
I have a CL, which fixes this issue by using file from cache and removing temporary file. The link to the CL - https://go-review.googlesource.com/c/go/+/838145.