An attempt to detect long running promises in JavaScript code on the server. Unfortunately it can't get a reference to execution context, which diminishes its usefulness

find-long-running-promises.js

const ah = require('async_hooks')
const promiseTimes = {}
// if a promise runs for more than 10s, something's wrong
const MAX_TIME = 10 * 1000
ah.createHook({
    // save meta data when async instantiates
    init(asyncId, type) {
        promiseTimes[asyncId] = {
            type
        }
    },
    // save timestamp when promise begins
    before(asyncId) {
        if (!promiseTimes[asyncId]) {
            promiseTimes[asyncId] = {}
        }

        promiseTimes[asyncId].time = new Date()
        // warn if a promise doesn't resolve in time
        promiseTimes[asyncId].timer = setTimeout(() => {
            if (promiseTimes[asyncId]) {
                Logger.warn(`Promise not resolved within ${MAX_TIME}ms`, {
                    type: promiseTimes[asyncId].type
                })
            }
        }, MAX_TIME)
    },
    // check duration and cleanup when promise ends
    after(asyncId) {
        if (promiseTimes[asyncId]) {
            const delta = new Date() - promiseTimes[asyncId].time

            if (delta > MAX_TIME) {
                Logger.warn(`Promise ran longer than ${MAX_TIME}ms`, {
                    delta,
                    type: promiseTimes[asyncId].type
                })
            }
        }
    },
    // cleanup
    destroy(asyncId) {
        if (promiseTimes[asyncId]) {
            clearTimeout(promiseTimes[asyncId].timer)
            delete promiseTimes[asyncId]
        }
    }
}).enable()