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node: improve performance of process.hrtime() #4484

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Dec 30, 2015
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node: improve performance of process.hrtime() #4484

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10 changes: 0 additions & 10 deletions src/node.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -2138,18 +2138,8 @@ void Kill(const FunctionCallbackInfo<Value>& args) {
// and nanoseconds, to avoid any integer overflow possibility.
// Pass in an Array from a previous hrtime() call to instead get a time diff.
void Hrtime(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);

uint64_t t = uv_hrtime();

if (!args[1]->IsUndefined()) {
if (!args[1]->IsArray()) {
return env->ThrowTypeError(
"process.hrtime() only accepts an Array tuple");
}
args.GetReturnValue().Set(true);
}

Local<ArrayBuffer> ab = args[0].As<Uint32Array>()->Buffer();
uint32_t* fields = static_cast<uint32_t*>(ab->GetContents().Data());

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24 changes: 16 additions & 8 deletions src/node.js
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Expand Up @@ -192,15 +192,23 @@
}

process.hrtime = function hrtime(ar) {
const ret = [0, 0];
if (_hrtime(hrValues, ar)) {
ret[0] = (hrValues[0] * 0x100000000 + hrValues[1]) - ar[0];
ret[1] = hrValues[2] - ar[1];
} else {
ret[0] = hrValues[0] * 0x100000000 + hrValues[1];
ret[1] = hrValues[2];
_hrtime(hrValues);

if (typeof ar !== 'undefined') {
if (Array.isArray(ar)) {
return [
(hrValues[0] * 0x100000000 + hrValues[1]) - ar[0],
hrValues[2] - ar[1]
];
}

throw new TypeError('process.hrtime() only accepts an Array tuple');
}
return ret;

return [
hrValues[0] * 0x100000000 + hrValues[1],
hrValues[2]
];
};
};

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