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console,internal/errors: improve error perf #13743

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console,internal/errors: improve error perf #13743

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f0baeea
console: use a plain object for the the error stack
BridgeAR Jun 17, 2017
e16faad
internal/errors: prevent stack recalculation
BridgeAR Jun 17, 2017
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9 changes: 4 additions & 5 deletions lib/console.js
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Expand Up @@ -151,11 +151,10 @@ Console.prototype.timeEnd = function timeEnd(label) {


Console.prototype.trace = function trace(...args) {
// TODO probably can to do this better with V8's debug object once that is
// exposed.
var err = new Error();
err.name = 'Trace';
err.message = util.format.apply(null, args);
const err = {
name: 'Trace',
message: util.format.apply(null, args)
};
Error.captureStackTrace(err, trace);
this.error(err.stack);
};
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1 change: 0 additions & 1 deletion lib/internal/errors.js
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Expand Up @@ -28,7 +28,6 @@ function makeNodeError(Base) {
constructor(key, ...args) {
super(message(key, args));
this[kCode] = key;
Error.captureStackTrace(this, NodeError);
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I'm -1 on removing this line. The fact that NodeError is being used in here should not be visible to the end user. This intentionally removes that frame from the stack trace to provide that transparency.

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The frame is not visible because newer v8 versions remove the constructor frame by default.
That's the reason why I removed the Error.captureStackTrace call. Do you maybe know a better description for the commit message to make it clearer?

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I checked all other occurrences as well and they are always needed besides here.

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oh nice... I knew that change was coming but I wasn't expecting it until 6.x for some reason. :-) ... that's a happy surprise. I withdraw the objection then!

}

get name() {
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