tree 3ec30ed38f6422969efc9a833283534d24b55640
parent c2a10d4b4cfcfaaa478f88652a9ccd2eb1fb211e
author Willy Tarreau <w@1wt.eu> 1544172001 +0100
committer Willy Tarreau <w@1wt.eu> 1544185559 +0100
encoding latin1

MEDIUM: ist: use local conversion arrays to case conversion

Calling tolower/toupper for each character is slow, a lookup into a
256-byte table is cheaper, especially for common characters used in
header field names which all fit into a cache line. Let's create these
two variables marked weak so that they're included only once.