397d2117ec
Currently, with Green Tea GC, we need to copy (really bitwise-or) mark bits back into mspan.gcmarkBits, so that it can propagate to mspan.allocBits at sweep time. This function does actually seem to make sweeping small spans a good bit more expensive, though sweeping is still relatively cheap. There's some low-hanging fruit here though, in that the merge is performed one byte at a time, but this is pretty inefficient. We can almost as easily perform this merge one word at a time instead, which seems to make this operation about 33% faster. For #73581. Change-Id: I170d36e7a2193199c423dcd556cba048ebd698af Reviewed-on: https://go-review.googlesource.com/c/go/+/687935 Reviewed-by: Michael Pratt <mpratt@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Auto-Submit: Michael Knyszek <mknyszek@google.com> |
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The Go Programming Language
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