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Optimize method compilation with/without strict mode.

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Former-commit-id: 05e4d9282116987b53a817b406c82c140a25c761
This commit is contained in:
John-David Dalton
2012-08-23 01:17:02 -07:00
parent 8d35d78eff
commit a2665529f6
4 changed files with 151 additions and 142 deletions
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25
build.js
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@@ -50,15 +50,16 @@
if (isStrict) {
source = setUseStrictOption(source, true);
}
else if (!useStrict) {
} else {
source = removeUseStrictDirective(source);
source = setUseStrictOption(source, false);
if (!useStrict) {
source = setUseStrictOption(source, false);
}
}
if (isLegacy) {
source = replaceVar(source, 'noArgsClass', 'true');
['isBindFast', 'isKeysFast', 'nativeBind', 'nativeIsArray', 'nativeKeys'].forEach(function(varName) {
['isBindFast', 'isKeysFast', 'isStrictFast', 'nativeBind', 'nativeIsArray', 'nativeKeys'].forEach(function(varName) {
source = replaceVar(source, varName, 'false');
});
}
@@ -686,11 +687,14 @@
* @returns {String} Returns the modified source.
*/
function setUseStrictOption(source, value) {
return source
// remove `isStrictFast` assignment
return removeVar(source, 'isStrictFast')
// replace `useStrict` branch in `value` with hard-coded option
.replace(/(?: *\/\/.*\n)*(\s*)' *<% *if *\(useStrict\).+/, value ? "$1'\\'use strict\\';\\n' +" : '')
// remove `useStrict` from iterator options
.replace(/ *'useStrict': *false,\n/g, '')
// remove `useStrict` variable assignment in `createIterator`
.replace(/,\s*useStrict *=[^;]+/, '')
// remove `useStrict` data object property assignment in `createIterator`
.replace(/\s*.+?\.useStrict *=.+/, '');
}
@@ -708,7 +712,7 @@
source = source.replace(/prototype\s*=\s*{\s*valueOf\s*:\s*1\s*}/, 'prototype={valueOf:1,y:1}');
// re-remove "use strict" added by the minifier
if (!useStrict) {
if (!isStrict) {
source = removeUseStrictDirective(source);
}
fs.writeFileSync(path.join(cwd, filename), source);
@@ -1057,10 +1061,6 @@
debugSource = source;
// remove associated functions, variables, and code snippets that the minifier may miss
if (isRemoved(source, 'bind')) {
source = removeVar(source, 'nativeBind');
source = removeVar(source, 'isBindFast');
}
if (isRemoved(source, 'isArray')) {
source = removeVar(source, 'nativeIsArray');
}
@@ -1087,6 +1087,11 @@
source = removeFunction(source, 'createIterator');
source = source.replace(/(?:\n +\/\*[^*]*\*+(?:[^\/][^*]*\*+)*\/)?\n *var noArgsEnum;|.+?noArgsEnum *=.+/g, '');
}
if (isRemoved(source, 'createIterator', 'bind')) {
source = removeVar(source, 'isBindFast');
source = removeVar(source, 'isStrictFast');
source = removeVar(source, 'nativeBind');
}
if (isRemoved(source, 'createIterator', 'bind', 'isArray', 'keys')) {
source = removeVar(source, 'reNative');
}