[PATCH] D127779: [LTO][ELF] Add --lto-exit-on option

[Jin Xin Ng via Phabricator via llvm-commits]

Northbadge added a comment.

In D127779#3637825 <https://reviews.llvm.org/D127779#3637825>, @MaskRay wrote:

> I can see that fine-grained --save-temps=xxx is useful, but the utility of --lto-exit-on is unclear. Why is the overhead considered so high that an option needs to be added?

It is admittedly more of a nice-to-have development tool/utility. On a 128 thread machine (with enough memory) the difference between having it vs not having it for the "exit on import" case with Chrome (~30k modules) is 1m20s vs 2m20s; extrapolating the parallelized portion to a more conventional 16 thread cpu that'd be a ~5 minute difference instead


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https://reviews.llvm.org/D127779