Run results for: event emit

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
orig	975515.4 Ops/sec
sniff	631464.8 Ops/sec

Script Preparation code:

var listeners = [
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  () => {},
  ];

var args = [];

Tests:

orig
for (let i = 0, { length } = listeners; i < listeners; ++i) { const result = listeners[i].apply(this, args); // We check if result is undefined first because that // is the most common case so we do not pay any perf // penalty. // This code is duplicated because extracting it away // would make it non-inlineable. if (result !== undefined && result !== null) { } }
sniff
for (let i = 0, { length } = listeners; i < length; ++i) { const listener = listeners[i]; const result = listener(); // We check if result is undefined first because that // is the most common case so we do not pay any perf // penalty. // This code is duplicated because extracting it away // would make it non-inlineable. if (result !== undefined && result !== null) { } }

Run results for: event emit

orig

sniff