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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// TODO(petamoriken): enable prefer-primordials for node polyfills
// deno-lint-ignore-file prefer-primordials
import { notImplemented } from "ext:deno_node/_utils.ts";
import {
performance as shimPerformance,
PerformanceEntry,
} from "ext:deno_web/15_performance.js";
import { EldHistogram } from "ext:core/ops";
class PerformanceObserver {
static supportedEntryTypes: string[] = [];
observe() {
// todo(lucacasonato): actually implement this
}
disconnect() {
// todo(lucacasonato): actually implement this
}
}
const constants = {};
const performance:
& Omit<
Performance,
"clearMeasures" | "getEntries"
>
& {
eventLoopUtilization(): {
idle: number;
active: number;
utilization: number;
};
nodeTiming: Record<string, string>;
// deno-lint-ignore no-explicit-any
timerify: any;
// deno-lint-ignore no-explicit-any
timeOrigin: any;
// deno-lint-ignore no-explicit-any
markResourceTiming: any;
} = {
clearMarks: (markName: string) => shimPerformance.clearMarks(markName),
eventLoopUtilization: () => {
// TODO(@marvinhagemeister): Return actual non-stubbed values
return { idle: 0, active: 0, utilization: 0 };
},
mark: (markName: string) => shimPerformance.mark(markName),
measure: (
measureName: string,
startMark?: string | PerformanceMeasureOptions,
endMark?: string,
): PerformanceMeasure => {
if (endMark) {
return shimPerformance.measure(
measureName,
startMark as string,
endMark,
);
} else {
return shimPerformance.measure(
measureName,
startMark as PerformanceMeasureOptions,
);
}
},
nodeTiming: {},
now: () => shimPerformance.now(),
timerify: () => notImplemented("timerify from performance"),
get timeOrigin() {
// deno-lint-ignore no-explicit-any
return (shimPerformance as any).timeOrigin;
},
getEntriesByName: (name, type) =>
shimPerformance.getEntriesByName(name, type),
getEntriesByType: (type) => shimPerformance.getEntriesByType(type),
markResourceTiming: () => {},
// @ts-ignore waiting on update in `deno`, but currently this is
// a circular dependency
toJSON: () => shimPerformance.toJSON(),
addEventListener: (
...args: Parameters<typeof shimPerformance.addEventListener>
) => shimPerformance.addEventListener(...args),
removeEventListener: (
...args: Parameters<typeof shimPerformance.removeEventListener>
) => shimPerformance.removeEventListener(...args),
dispatchEvent: (
...args: Parameters<typeof shimPerformance.dispatchEvent>
) => shimPerformance.dispatchEvent(...args),
};
function monitorEventLoopDelay(options = {}) {
const { resolution = 10 } = options;
return new EldHistogram(resolution);
}
export default {
performance,
PerformanceObserver,
PerformanceEntry,
monitorEventLoopDelay,
constants,
};
export {
constants,
monitorEventLoopDelay,
performance,
PerformanceEntry,
PerformanceObserver,
};
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