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From: | Paul Eggert |
Subject: | Re: Using __builtin_expect (likely/unlikely macros) |
Date: | Sat, 20 Apr 2019 09:11:30 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
Eli Zaretskii wrote:
I consider 1.3% performance improvement as insignificant for all practical purposes.
When I'm talking about performance measurements I try to use the word "significant" in its usual scientific sense <https://en.wikipedia.org/wiki/Statistical_significance>.
Agreed that 1.3% is no big deal by itself, but if one can make a series of 1.3% performance improvements that build on each other, their effects multiply and the overall effort has worthwhile practical benefits.
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