Improves lute runtime performance when scheduling many threads#706
Merged
Vighnesh-V merged 1 commit intoprimaryfrom Jan 6, 2026
Merged
Improves lute runtime performance when scheduling many threads#706Vighnesh-V merged 1 commit intoprimaryfrom
Vighnesh-V merged 1 commit intoprimaryfrom
Conversation
Vighnesh-V
force-pushed
the
lute-runtime-vecdeque
branch
from
b51286a to
0fe89b4
Compare
vrn-sn
approved these changes
Jan 6, 2026
Member
vrn-sn
left a comment
vrn-sn
left a comment
There was a problem hiding this comment.
Awesome! Curious, do you have any numbers on the improvement?
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
2 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
The lute runtime currently schedules coroutines in a std::vector, and we always pop off the first thread in the vector to run. For small numbers of coroutines, this is okay, but when you get to 10k+ this becomes very inefficient as we have to move all the other elements one over
O(n). This PR just replaces thestd::vectorwith aLuau::VecDeque, making the pop operationO(1).I've also included a profiling script that I used to profile lute since I keep forgetting the
xctraceincantation - it can be invoked by: