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avoid suboptimal termination in passes (#2787)

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This commit is contained in:
Alex Lam S.L
2018-01-15 16:42:31 +08:00
committed by GitHub
parent cbbe6fad60
commit b483678ca7
1 changed files with 11 additions and 4 deletions
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15
lib/compress.js
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@@ -171,7 +171,8 @@ merge(Compressor.prototype, {
node.process_expression(true); node.process_expression(true);
} }
var passes = +this.options.passes || 1; var passes = +this.options.passes || 1;
var last_count = 1 / 0; var min_count = 1 / 0;
var stopping = false;
var mangle = { ie8: this.option("ie8") }; var mangle = { ie8: this.option("ie8") };
for (var pass = 0; pass < passes; pass++) { for (var pass = 0; pass < passes; pass++) {
node.figure_out_scope(mangle); node.figure_out_scope(mangle);
@@ -183,9 +184,15 @@ merge(Compressor.prototype, {
node.walk(new TreeWalker(function() { node.walk(new TreeWalker(function() {
count++; count++;
})); }));
this.info("pass " + pass + ": last_count: " + last_count + ", count: " + count); this.info("pass " + pass + ": last_count: " + min_count + ", count: " + count);
if (count >= last_count) break; if (count < min_count) {
last_count = count; min_count = count;
stopping = false;
} else if (stopping) {
break;
} else {
stopping = true;
}
} }
} }
if (this.option("expression")) { if (this.option("expression")) {