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Improve multitask performance #273
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@hsbt is there anything more that this PR needs to be merged? |
Interesting! @hsbt anything blocking us from merging this? |
@@ -248,7 +248,7 @@ def invoke_prerequisites_concurrently(task_args, invocation_chain)# :nodoc: | |||
r.invoke_with_call_chain(prereq_args, invocation_chain) | |||
end | |||
end | |||
futures.each(&:value) | |||
futures.reverse_each(&:value) |
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@jsm Can you add comment for performace reason about reverse_each
?
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@hsbt Updated, let me know if you think I need to add more detail.
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@jsm Thanks! |
Thread context switches are expensive, iterating through promises in reverse minimizes them.
See my blog post about it here: https://medium.com/@sanmiguelje/optimizing-rake-multitask-fece36a16c8f