tree 19c7efe7b981bfaa81d0180cdd94bb1196b03bf5
parent c2ede92a0d461cca8ab5fba8840e15670710fbd9
author Joe Tsai <joetsai@digital-static.net> 1663890859 -0700
committer Gopher Robot <gobot@golang.org> 1663907692 +0000

path/filepath: optimize isReservedName

A linear search through a list of 22 strings takes ~80ns.
A quick check for 3-4 byte strings reduces this check to 2ns
for a vast majority of inputs.
In the event of a name match, the new logic is either just
as fast (for "CON") or 10x faster (for "LPT9").

Change-Id: I412fa73beebd7c81dc95f9ed12c35ca1d5d6baf0
Reviewed-on: https://go-review.googlesource.com/c/go/+/433175
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Ian Lance Taylor <iant@google.com>