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Peephole Optimization | 319 comments | Create New Account

Comments belong to whoever posts them. Please notify us of inappropriate comments.

Peephole Optimization

Authored by: Anonymous on Saturday, May 19 2012 @ 03:17 PM EDT

Yeah, Google's technique is just a simple peephole optimization, where they look
for a set of four instructions and replace the wasteful instructions with a
static array initialization. In other words, they put the number where it's
supposed to go in memory ahead of time, rather than making the machine do that
every single time the program runs.

What Google is doing is really just a plain old peephole optimization which has
been known for ages. In pretty much every peephole optimization, you do exactly
what Google does: find some pattern, then replace it with something faster.

[ Reply to This | Parent | # ]

Peephole Optimization - Authored by: Anonymous on Saturday, May 19 2012 @ 09:12 PM EDT

Peephole Optimization

Authored by: Dick Gingras on Sunday, May 20 2012 @ 12:43 PM EDT

My copy of the Dragon Book was published in 1977; in Chapter 15 it discusses peephole optimization over the course of about 5 pages. In the Bibliographic notes for the chapter, it says "Peephole optimization was discussed by McKeenan [1965].".

---
SCO est mortuus caro; requiescat in ignominiam!

[ Reply to This | Parent | # ]

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