Change jitdiff parallelism from coreCount * 2 to coreCount#436
Open
MihaZupan wants to merge 1 commit into
Open
Change jitdiff parallelism from coreCount * 2 to coreCount#436MihaZupan wants to merge 1 commit into
MihaZupan wants to merge 1 commit into
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
When diffing corelib+framework assemblies, the largest assemblies end up taking much longer than the rest, so by the end we're only jitting 1 or 2 dlls for a while. By turning parallelism down a bit, those large assemblies get more CPU time at the start, reducing the overall time to finish all of them.
I just did a quick test of before/after with MihuBot and it saves ~10 seconds (2m 40s => 2m 30s) on a 16-core VM when jitting two copies of runtime at the same time.
Could probably save a bit more by tweaking process priority / watching CPU usage, but this was a trivial change to make.