window.performance.now()
const s = window.performance.now()
this.$refs.table.toggleRowSelection(row)
setTimeout(() => {
this.renderTime = (window.performance.now() - s).toFixed(2) + 'ms'
})
console.time方法与console.timeEnd方法
console.time('small loop');
for (var i = 0; i < 100000; i++) {
;
}
console.timeEnd('small loop');
console.time(1);
setTimeout(function(){
console.timeEnd(1);
}, 16.7);
var suite = new Benchmark.Suite;
// add tests
suite.add('RegExp#test', function() {
/o/.test('Hello World!');
})
.add('String#indexOf', function() {
'Hello World!'.indexOf('o') > -1;
})
// add listeners
.on('cycle', function(event) {
console.log(String(event.target));
})
.on('complete', function() {
console.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async
.run({ 'async': true });
// logs:
// => RegExp#test x 4,161,532 +-0.99% (59 cycles)
// => String#indexOf x 6,139,623 +-1.00% (131 cycles)
// => Fastest is String#indexOf
