{"id":22602828,"url":"https://github.com/wahengchang/javascript-function-performance-measurement","last_synced_at":"2025-07-22T01:31:23.408Z","repository":{"id":84319783,"uuid":"99549243","full_name":"wahengchang/javascript-function-performance-measurement","owner":"wahengchang","description":null,"archived":false,"fork":false,"pushed_at":"2017-08-07T07:42:34.000Z","size":2,"stargazers_count":6,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-04-11T03:32:48.328Z","etag":null,"topics":["check","functions","injection","javascript","measurements","nodejs","object","overwire","performance","react","testing"],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/wahengchang.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2017-08-07T07:23:40.000Z","updated_at":"2022-05-24T08:17:42.000Z","dependencies_parsed_at":null,"dependency_job_id":"835c7eaf-3a0f-4a47-8e4f-6309608d41c6","html_url":"https://github.com/wahengchang/javascript-function-performance-measurement","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/wahengchang/javascript-function-performance-measurement","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wahengchang%2Fjavascript-function-performance-measurement","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wahengchang%2Fjavascript-function-performance-measurement/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wahengchang%2Fjavascript-function-performance-measurement/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wahengchang%2Fjavascript-function-performance-measurement/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/wahengchang","download_url":"https://codeload.github.com/wahengchang/javascript-function-performance-measurement/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wahengchang%2Fjavascript-function-performance-measurement/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":266409443,"owners_count":23924284,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-07-21T11:47:31.412Z","response_time":64,"last_error":null,"robots_txt_status":null,"robots_txt_updated_at":null,"robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["check","functions","injection","javascript","measurements","nodejs","object","overwire","performance","react","testing"],"created_at":"2024-12-08T12:42:36.396Z","updated_at":"2025-07-22T01:31:23.326Z","avatar_url":"https://github.com/wahengchang.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# javascript-function-performance-measurement\nIt is an example of modifying an object of functions collection, with performace check.\n\n\n#### Suitable object\n```js\nconst class1 = {\n    fun: (max = 1000) =\u003e {\n            let count = 0\n            for( let i =0; i\u003cmax; i++){count +=1}\n            return count\n        }\n}\n```\n### Performace injection\n```js\n\nvar temp = class1['fun']\nclass1['fun'] = function(){\n\n    /*_*_*_*_ Init _*_*_*/\n    var old_time = new Date();\n    var m0 = process.memoryUsage()\n    var c0 = process.cpuUsage()\n\n    var returnResult = temp.apply(this,arguments);\n\n    /*_*_*_*_ Finished _*_*_*/\n    var new_time = new Date();\n    var m1 = process.memoryUsage()\n    var c1 = process.cpuUsage()\n    var diffCPU = process.cpuUsage(c0)\n\n    console.log(`           *_*_*_ function ${fun} _*_*_*`)\n    console.log('           RAM         : ', (m1['rss'] - m0['rss']) / 1048576, 'mb')\n    console.log('           HeapTotal   : ', (m1['heapTotal'] - m0['heapTotal']) / 1048576, 'mb')\n    console.log('           HeapUsed    : ', (m1['heapUsed'] - m0['heapUsed']) / 1048576, 'mb')\n    console.log('           External    : ', (m1['external'] - m0['external']) / 1048576, 'mb')\n    console.log('           CPU         : ', (diffCPU.user + diffCPU.system) /1000000, 's')\n    console.log('           Spend time  : ', (new_time - old_time), 'ms')\n    return returnResult\n}\n```\n\n## Result\n```\n           *_*_*_ function funCallback _*_*_*\n           RAM         :  0.28125 mb\n           HeapTotal   :  0.5 mb\n           HeapUsed    :  0.29491424560546875 mb\n           External    :  0 mb\n           CPU         :  0.00137 s\n           Spend time  :  2 ms\n```\n\n\n## Run\n```\n$ npm install \n$ node example\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwahengchang%2Fjavascript-function-performance-measurement","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwahengchang%2Fjavascript-function-performance-measurement","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwahengchang%2Fjavascript-function-performance-measurement/lists"}