Task-based performance measurement utility. performance-time measures the execution time of the code you want to check.
- 1.1.0
Added Warmup task that runs before running first task.
As a result, the initial task no longer runs quickly. (Fixed bug)
swap1(), swap2() tasks result:
[ { task: 'swap1', repeat: 200000000, time: 620 },
{ task: 'swap2', repeat: 200000000, time: 611 } ]
addTask(task1 [, task2, ..., taskN])
Add name of the tasks to measure performance. Tasks must be executable functions or methods.
clearTask()
Delete all tasks added through addTask.
run([obj.repeat])
Run the all added tasks and return performance time result. If add the repeat option, it will apply only to this run. Otherwise, the default(repeat = 100000) is applied.
result()
Returns Array about performance time result of the last run.
npm install performance-time// ES5 version sample code.
var Performance= require('performance-time');
var perf = new Performance({repeat:100000000});
// Add the task-functions
perf.addTask(swap1, swap2);
// Run the all added tasks and print report about the run.
console.log('Way1: ', perf.run());
//Way1: [ { task: 'swap1', repeat: 100000000, time: 60 },
// { task: 'swap2', repeat: 100000000, time: 470 } ]
// Or
perf.run({repeat:300}); // 'repeat' only apply to this run.
console.log('Way2: ', perf.result());
//Way2: [ { task: 'swap1', repeat: 300, time: 0 },
// { task: 'swap2', repeat: 300, time: 0 } ]
// Clear all tasks added on perf.
perf.clearTask();
/* --- Tasks */
// Traditional swap which uses three variables
function swap1() {
var a=1, b=2;
var temp = a;
a=b;
b=temp;
if(a !== 2 || b !== 1)
console.error('swap fail: ', a, b);
}
// Swap which only uses two variables
function swap2() {
var a = 1, b = 2;
a = a ^ b;
b = a ^ b;
a = a ^ b;
if(a !== 2 || b !== 1)
console.error('swap fail: ', a, b);
}