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[Perf] (ShaderTranspiler): memchr the mid-line #version scan and gate it on an accepted directive

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swung0x48
2026-08-27 03:35:57 -04:00
parent f1354dc25e
commit 9e23016dd4
1 changed files with 9 additions and 4 deletions
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MobileGL/MG_Util/ShaderTranspiler/ShaderSourceProcessor.cpp
+9 -4
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@@ -335,10 +335,15 @@ namespace {
// #version splice the second into the tail of the first. Only an EXACT repeat of
// the directive already accepted is recognized here; see
// BlankRedundantVersionDirectives for why that one is tolerated and nothing else.
for (SizeT scan = probe; scan < lineEnd; ++scan) {
if (code[scan] != '#') continue;
recordIfRedundant(scan, lineEnd);
break;
//
// Gated on a directive having been accepted already, so an ordinary shader - which
// has none of these - pays one memchr per line past its #version line and nothing
// before it.
if (info.hasValidVersionDirective) {
const SizeT hashPos = code.find('#', probe);
if (hashPos != MobileGL::String::npos && hashPos < lineEnd) {
recordIfRedundant(hashPos, lineEnd);
}
}
} else {
const SizeT directiveStart = probe;