@namchee/decora/build/umd/src/benchmark.js

Useful ECMAScript-compliant decorators to enhance JS (specifically, TypeScript) development experience

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "./utils"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.benchmark = void 0;
    const utils_1 = require("./utils");
    function benchmark(metric = 'ms', precision, stream = process.stdout) {
        return function (target, keyName, descriptor) {
            if (!descriptor || !(descriptor.value instanceof Function)) {
                throw new Error('@benchmark decorator can only be applied to functions');
            }
            let logger;
            let performance;
            if (utils_1.isNode) {
                const Console = require('console').Console;
                logger = new Console({ stdout: stream });
                performance = require('perf_hooks').performance;
            }
            else if (utils_1.isBrowser) {
                logger = window.console;
                performance = window.performance;
                if (stream) {
                    logger.warn('The `stream` option only available on Node.JS environment. This option will be ignored.');
                }
            }
            else {
                return;
            }
            const fn = descriptor.value;
            descriptor.value = function (...args) {
                return __awaiter(this, void 0, void 0, function* () {
                    const start = performance.now();
                    const result = yield fn.apply(this, args);
                    const end = performance.now();
                    let diff = end - start;
                    if (metric !== 'ms') {
                        diff = metric === 's' ?
                            diff / 1000 :
                            diff * 1000;
                    }
                    logger.info(`Function ${keyName} from class ${target.constructor.name} was executed in ${diff.toFixed(precision)} ${metric}`);
                    return result;
                });
            };
        };
    }
    exports.benchmark = benchmark;
});