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Cache scalar regexes

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This improves performance on the test.yaml attached to #158 by about
35% on my machine (0.39s -> 0.25s), as measured by
`time build/util/parse < test.yaml > /dev/null`.
This commit is contained in:
Scott Wolchok
2016-01-07 15:02:38 -08:00
committed by Jesse Beder
parent 9e37409b4b
commit 8c35a8ffab
2 changed files with 11 additions and 2 deletions
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9
src/exp.h
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@@ -165,6 +165,15 @@ inline const RegEx& EndScalarInFlow() {
return e; return e;
} }
inline const RegEx& ScanScalarEndInFlow() {
static const RegEx e = (EndScalarInFlow() || (BlankOrBreak() + Comment()));
return e;
}
inline const RegEx& ScanScalarEnd() {
static const RegEx e = EndScalar() || (BlankOrBreak() + Comment());
return e;
}
inline const RegEx& EscSingleQuote() { inline const RegEx& EscSingleQuote() {
static const RegEx e = RegEx("\'\'"); static const RegEx e = RegEx("\'\'");
return e; return e;

4
src/scantoken.cpp
View File

@@ -297,8 +297,8 @@ void Scanner::ScanPlainScalar() {
// set up the scanning parameters // set up the scanning parameters
ScanScalarParams params; ScanScalarParams params;
params.end = (InFlowContext() ? Exp::EndScalarInFlow() : Exp::EndScalar()) || params.end =
(Exp::BlankOrBreak() + Exp::Comment()); (InFlowContext() ? Exp::ScanScalarEndInFlow() : Exp::ScanScalarEnd());
params.eatEnd = false; params.eatEnd = false;
params.indent = (InFlowContext() ? 0 : GetTopIndent() + 1); params.indent = (InFlowContext() ? 0 : GetTopIndent() + 1);
params.fold = FOLD_FLOW; params.fold = FOLD_FLOW;