[ruby-core:73496] Re: [Ruby trunk - Feature #12025] [Open] Reduce minimum string buffer size from 128 to 127

[e-mail] wrote:
> String.buffer(100) wastes much less memory with this patch, as the
> malloc implementation can more easily deal with the power-of-2
> sized memory usage.  As measured above, memory usage is 44% less,
> and performance is 17% better.

None of jemalloc, dlmalloc 2.8.6, or glibc (dlmalloc 2.7.x-based) are
power-of-2 allocators.  I was not able to measure a difference with any
of those.

But yeah, I could see this being an improvement for power-of-2 malloc
implementations out there (OpenBSD?).  I don't think your change
would be harmful for jemalloc/dlmalloc/glibc users, either.

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