localvoid / Perf Monitor
Licence: mit
Performance monitor. Simple UI component that helps you measure performance.
Stars: ✭ 115
Programming Languages
typescript
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Performance monitor. Simple UI component that helps you measure performance. Demo
Example
<!doctype html>
<html>
<head>
<title>perf monitor example</title>
</head>
<body>
<script src="https://unpkg.com/[email protected]^0.3/dist/umd/perf-monitor.js"></script>
<script>
// initProfiler will create a new monitor component and inject it into your
// document.
perfMonitor.initProfiler('a');
perfMonitor.initProfiler('b');
function tick() {
// save start time of the profiled code
perfMonitor.startProfile('a');
let a = Math.random();
for (let i = 0; i < 100; i++) {
a += Math.random();
}
// measure time between the start of the profiled code and the current time
perfMonitor.endProfile('a');
perfMonitor.startProfile('b');
let b = Math.random();
for (let i = 0; i < 100; i++) {
b *= Math.random();
}
perfMonitor.endProfile('b');
console.log(a);
console.log(b);
setTimeout(tick, 30);
}
setTimeout(tick, 30);
</script>
</body>
</html>
NPM Package
Npm package perf-monitor provides umd module, es6 module and TypeScript typings.
API
initPerfMonitor(options: PerfMonitorOptions)
Initialize performance monitor. If perf monitor isn't initialized with this function, it will use default options.
Options:
container: HTMLElement
startFPSMonitor(flags?: MonitorWidgetFlags)
Add FPS monitor.
startMemMonitor(flags?: MonitorWidgetFlags)
Add Memory Monitor if browser has window.performance.memory object.
initProfiler(name: string, flags: MonitorWidgetFlags = 0)
Add code profiler monitor.
initCounter(name: string, interval?: number)
Add counter. Optional interval parameter sets sliding window interval.
startProfile(name: string)
Save start time of the profiled code.
endProfile(name: string)
Measure time between the start of the profiled code and the current time.
count(name: string, value = 1)
Increments counter.
MonitorWidgetFlags
enum MonitorWidgetFlags {
HideMin = 1,
HideMax = 1 << 1,
HideMean = 1 << 2,
HideLast = 1 << 3,
HideGraph = 1 << 4,
RoundValues = 1 << 5,
}
MonitorSamples
interface MonitorSamples {
readonly samples: number[];
readonly maxSamples: number;
}
ProfilerDetails
interface ProfilerDetails {
data: MonitorSamples;
widget: MonitorWidget;
startTime: number;
}
Counter
interface Counter {
value: number;
}
CounterDetails
interface CounterDetails {
data: Counter;
widget: CounterWidget;
}
getProfile(name: string): ProfilerDetails | null
Lookup a profile by name
getCounter(name: string): CounterDetails | null
Lookup a counter by name
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