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Code Issues Releases Wiki Activity

Performance optimisations

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In some situations, I’m seeing x2.5 speedups with these optimisations

Starts fixing #1864
This commit is contained in:
Jermolene
2015-07-05 19:47:44 +01:00
parent a86cfe2663
commit c6e48ebc2d
5 changed files with 54 additions and 39 deletions
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40
core/modules/parsers/parseutils.js
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@@ -32,29 +32,39 @@ The exception is `skipWhiteSpace`, which just returns the position after the whi
Look for a whitespace token. Returns null if not found, otherwise returns {type: "whitespace", start:, end:,}
*/
exports.parseWhiteSpace = function(source,pos) {
var node = {
type: "whitespace",
start: pos
};
var re = /(\s)+/g;
re.lastIndex = pos;
var match = re.exec(source);
if(match && match.index === pos) {
node.end = pos + match[0].length;
return node;
var p = pos,c;
while(true) {
c = source.charAt(p);
if((c === " ") || (c === "\f") || (c === "\n") || (c === "\r") || (c === "\t") || (c === "\v") || (c === "\u00a0")) { // Ignores some obscure unicode spaces
p++;
} else {
break;
}
}
if(p === pos) {
return null;
} else {
return {
type: "whitespace",
start: pos,
end: p
}
}
return null;
};
/*
Convenience wrapper for parseWhiteSpace. Returns the position after the whitespace
*/
exports.skipWhiteSpace = function(source,pos) {
var whitespace = $tw.utils.parseWhiteSpace(source,pos);
if(whitespace) {
return whitespace.end;
var c;
while(true) {
c = source.charAt(pos);
if((c === " ") || (c === "\f") || (c === "\n") || (c === "\r") || (c === "\t") || (c === "\v") || (c === "\u00a0")) { // Ignores some obscure unicode spaces
pos++;
} else {
return pos;
}
}
return pos;
};
/*