@graphql-codegen/plugin-helpers/esm/profiler.js

GraphQL Code Generator common utils and types

export function createNoopProfiler() {
    return {
        outputName: null,
        run(fn) {
            return Promise.resolve().then(() => fn());
        },
        collect() {
            return [];
        },
        clear() { },
    };
}
export function createProfiler() {
    /** Build a unique, human-readable trace filename e.g. `codegen-20111005T144800000.json` */
    function generateOutputName() {
        const datetimeNormalized = new Date()
            .toISOString() // 2011-10-05T14:48:00.000Z
            .replace(/[-:.Z]/g, ''); // 20111005T144800000
        return `codegen-${datetimeNormalized}.json`;
    }
    const events = [];
    let outputName = generateOutputName();
    return {
        get outputName() {
            return outputName;
        },
        collect() {
            return events;
        },
        clear() {
            events.length = 0;
            outputName = generateOutputName();
        },
        run(fn, name, cat) {
            let startTime;
            return Promise.resolve()
                .then(() => {
                startTime = process.hrtime();
            })
                .then(() => fn())
                .then(value => {
                const duration = process.hrtime(startTime);
                // Trace Event Format documentation:
                // https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview
                const event = {
                    name,
                    cat,
                    ph: 'X',
                    ts: hrtimeToMicroseconds(startTime),
                    pid: 1,
                    tid: 0,
                    dur: hrtimeToMicroseconds(duration),
                };
                events.push(event);
                return value;
            });
        },
    };
}
function hrtimeToMicroseconds(hrtime) {
    return (hrtime[0] * 1e9 + hrtime[1]) / 1000;
}