Commit c7311654 authored by Olivier Fourdan's avatar Olivier Fourdan Committed by Adam Jackson

dix: cache ResourceClientBits() value

The `LimitClient` is set once and for all at startup, whereas the
function `ResourceClientBits()` which returns the client field offset
within the XID based on the value of `LimitClient` can be called

Small optimization, cache the result of `ilog2()`, that saves running
the same loop over and over each time `ResourceClientBits()` is called.
Signed-off-by: 's avatarOlivier Fourdan <>
parent 48b1af27
......@@ -620,7 +620,12 @@ ilog2(int val)
unsigned int
return (ilog2(LimitClients));
static unsigned int cached = 0;
if (cached == 0)
cached = ilog2(LimitClients);
return cached;
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