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Austin Clements authored
Currently we acquire a global lock for every newMarkBits call. This is unfortunate since every span sweep operation calls newMarkBits. However, most allocations are simply linear allocations from the current arena. Take advantage of this to add a lock-free fast path for allocating from the current arena. With this change, the global lock only protects the lists of arenas, not the free offset in the current arena. Change-Id: I6cf6182af8492c8bfc21276114c77275fe3d7826 Reviewed-on: https://go-review.googlesource.com/34595 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Rick Hudson <rlh@golang.org>
2ef88f7f