Feature #10034: [PATCH] (struct re_pattern_buffer): reduce by cache line

• Status: Closed
• Assignee: normalperson (Eric Wong)
• Target version: 2.2.0

[normalperson (Eric Wong)]

Reducing struct re_pattern_buffer from 464 to 448 bytes allows it to fit
into neatly into seven 64-byte cache lines on x86-64 systems.

ABI is changed in 2.2.0dev anyways, so we may do this.
Will commit in a few days.
C extension users will need to rebuild extensions for this.
There'll probably be more changes like this (rb_io_t, maybe others).

• Status changed from Open to Closed
• % Done changed from 0 to 100

Applied in changeset r46881.

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re_pattern_buffer: shrink from 464 to 448 bytes on 64-bit

• include/ruby/oniguruma.h (struct re_pattern_buffer): shrink to 448
  bytes from 464 bytes on 64-bit. This breaks the ABI.
  [Feature #10034]

Reducing struct re_pattern_buffer from 464 to 448 bytes allows it to fit
into neatly into seven 64-byte cache lines on x86-64 systems.