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Code Issues Releases Wiki Activity

code review: marginal performance improvement

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This commit is contained in:
gorhill 2017-02-12 15:53:40 -05:00
parent 1e1508cdd2
commit 28084e1dc9
1 changed files with 24 additions and 12 deletions
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36
src/js/contentscript.js
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@ -1,7 +1,7 @@
/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2014-2016 Raymond Hill
Copyright (C) 2014-2017 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -1533,36 +1533,48 @@ vAPI.domSurveyor = (function() {
var surveyPhase1 = function(addedNodes) {
var t0 = window.performance.now(),
nodes = selectNodes('[class],[id]', addedNodes),
rews = reWhitespace,
qq = queriedSelectors,
ll = lowGenericSelectors,
node, v, vv, j,
i = nodes.length;
lli = ll.length,
nodes, i, node, v, vv, j;
nodes = selectNodes('[id]', addedNodes);
i = nodes.length;
while ( i-- ) {
node = nodes[i];
if ( node.nodeType !== 1 ) { continue; }
v = node.id;
if ( v !== '' && typeof v === 'string' ) {
v = '#' + v.trim();
if ( v !== '#' && !qq.has(v) ) { ll.push(v); qq.add(v); }
if ( typeof v !== 'string' ) { continue; }
v = '#' + v.trim();
if ( !qq.has(v) && v.length !== 1 ) {
ll[lli] = v; lli++; qq.add(v);
}
}
nodes = selectNodes('[class]', addedNodes);
i = nodes.length;
while ( i-- ) {
node = nodes[i];
vv = node.className;
if ( vv === '' || typeof vv !== 'string' ) { continue; }
if ( /\s/.test(vv) === false ) {
if ( typeof vv !== 'string' ) { continue; }
if ( !rews.test(vv) ) {
v = '.' + vv;
if ( !qq.has(v) ) { ll.push(v); qq.add(v); }
if ( !qq.has(v) && v.length !== 1 ) {
ll[lli] = v; lli++; qq.add(v);
}
} else {
vv = node.classList;
j = vv.length;
while ( j-- ) {
v = '.' + vv[j];
if ( !qq.has(v) ) { ll.push(v); qq.add(v); }
if ( !qq.has(v) ) {
ll[lli] = v; lli++; qq.add(v);
}
}
}
}
surveyCost += window.performance.now() - t0;
surveyPhase2(addedNodes);
};
var reWhitespace = /\s/;
var domChangedHandler = function(addedNodes) {
if ( cosmeticSurveyingMissCount > 255 ) {