snowflake-sdk/dist/lib/logger/execution_timer.js

Node.js driver for Snowflake

"use strict";
const { performance } = require('perf_hooks');
const Logger = require('../logger');
const Util = require('../util');
function ExecutionTimer() {
    let startTime = null;
    let endTime = null;
    // Private function to log and check if the timer was started
    function wasStarted() {
        return Util.exists(startTime);
    }
    this.start = function () {
        startTime = performance.now();
        endTime = null; // Reset endTime if the timer is reused
        return this;
    };
    this.stop = function () {
        if (!wasStarted()) {
            // Returning this to allow chaining even after invalid call.
            // startTime can be used to check, if any start point was ever recorded.
            Logger.getInstance().debug('Tried to stop timer, that was not started');
            return this;
        }
        endTime = performance.now();
        return this;
    };
    // Get the duration in milliseconds
    this.getDuration = function () {
        if (!wasStarted()) {
            return;
        }
        if (endTime === null) {
            endTime = performance.now();
        }
        return endTime - startTime;
    };
}
module.exports = ExecutionTimer;
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