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doc: update jump table performance release note

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Just make it clearer that the performance gains are for the switch
statement itself, not the whole program.

Change-Id: I2d1bf2888f61112af3dc37113e740b00b092e2cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/406874
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Keith Randall 2022-05-17 09:54:11 -07:00 committed by Keith Randall
parent 668041ef66
commit d23c80b8e4
1 changed files with 2 additions and 1 deletions
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@ -76,7 +76,8 @@ Do not send CLs removing the interior tags from such phrases.
The compiler now uses The compiler now uses
a <a href="https://en.wikipedia.org/wiki/Branch_table">jump a <a href="https://en.wikipedia.org/wiki/Branch_table">jump
table</a> to implement large integer and string switch statements. table</a> to implement large integer and string switch statements.
Performance improvements vary but can be on the order of 20% faster. Performance improvements for the switch statement vary but can be
on the order of 20% faster.
(<code>GOARCH=amd64</code> and <code>GOARCH=arm64</code> only) (<code>GOARCH=amd64</code> and <code>GOARCH=arm64</code> only)
<p> <p>