{"id":22960311,"url":"https://github.com/stringmanolo/javascript-performance-study","last_synced_at":"2025-07-19T19:40:05.847Z","repository":{"id":95119396,"uuid":"371105427","full_name":"StringManolo/javascript-performance-study","owner":"StringManolo","description":"Finding the fastest way to do things","archived":false,"fork":false,"pushed_at":"2021-05-31T06:27:18.000Z","size":13,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"main","last_synced_at":"2025-05-31T20:51:38.806Z","etag":null,"topics":[],"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/StringManolo.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":"2021-05-26T16:44:28.000Z","updated_at":"2021-05-31T06:27:20.000Z","dependencies_parsed_at":"2023-05-26T19:15:16.009Z","dependency_job_id":null,"html_url":"https://github.com/StringManolo/javascript-performance-study","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/StringManolo/javascript-performance-study","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/StringManolo%2Fjavascript-performance-study","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/StringManolo%2Fjavascript-performance-study/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/StringManolo%2Fjavascript-performance-study/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/StringManolo%2Fjavascript-performance-study/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/StringManolo","download_url":"https://codeload.github.com/StringManolo/javascript-performance-study/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/StringManolo%2Fjavascript-performance-study/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":264459416,"owners_count":23611727,"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","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":[],"created_at":"2024-12-14T18:32:34.854Z","updated_at":"2025-07-09T12:40:28.899Z","avatar_url":"https://github.com/StringManolo.png","language":"JavaScript","readme":"# javascript-performance-study\nFinding the fastest way to do things\n\nAndroid 10; ART-L29 Build HUAWEIART-L29\n\n## Clone Simple Objects \nConfig:  \n```Cloning 1.000.000 times```  \n  \n\n#### Chrome (88.0.4324.152)   \n|    Method     |     Time     |\n| :-----------: | :----------:  |\n|     JSON      |    2.069 s   |\n| Assign Props  |    0.163 s   |\n| Object.assign |    1.488 s   |\n\n  \n\n#### Firefox (Nightly 210310)  \n|    Method     |     Time     |\n| :-----------: | :----------: |\n|     JSON      |    3.116 s   |\n| Assign Props  |    0.162 s   |\n| Object.assign |    0.460 s   |\n  \n  \n\n#### Node (v14.15.4)   \n|    Method     |     Time     |\n| :-----------: | :----------: |\n|     JSON      |    3.833 s   |\n| Assign Props  |    0.179 s   |\n| Object.assign |    3.080 s   |\n\n#### Quickjs (v2020-11-08)  \n|    Method     |     Time     |\n| :-----------: | :----------: |\n|     JSON      |    7.820 s   |\n| Assign Props  |    2.508 s   |\n| Object.assign |    1.604 s   |\n  \n  \n  \nWinner:\n```js\n// Assign Props\nconst cloneObject = obj =\u003e {\n  let clone = {};\n  for(let key in obj) {\n    clone[key] = obj[key];\n  }\n  return clone;\n}\n```\n\nLoser:\n```js\n// JSON\nconst cloneObject = obj =\u003e {\n  let clone = JSON.parse(JSON.stringify(obj));\n  return clone;\n}\n```\n\n## Add 2 strings\nConfig: \n```Adding 1.000.000 times```  \n\n#### Chrome (88.0.4324.152)\n|    Method     |     Time     |\n| :-----------: | :----------: |\n|      +=       |    0.191 s   |\n|   [].push(1)  |    0.308 s   |\n|   [].push(2)  |    0.312 s   |\n|  \"\".concat()  |    0.248 s   |\n\n\n\n#### Firefox (Nightly 210310)\n|    Method     |     Time     |\n| :-----------: | :----------: |\n|      +=       |    0.068 s   |\n|   [].push(1)  |    0.142 s   |\n|   [].push(2)  |    0.261 s   |\n|  \"\".concat()  |    0.502 s   |\n\n\n\n#### Node (v14.15.4)\n|    Method     |     Time     |\n| :-----------: | :----------: |\n|      +=       |    0.412 s   |\n|   [].push(1)  |    0.373 s   |\n|   [].push(2)  |    0.291 s   |\n|  \"\".concat()  |    0.197 s   |\n\n#### Quickjs (v2020-11-08)\n|    Method     |     Time     |\n| :-----------: | :----------: |\n|      +=       |     slow s   |\n|   [].push(1)  |    0.666 s   |\n|   [].push(2)  |    0.432 s   |\n|  \"\".concat()  |    0.773 s   |\n\nWinner:\n```js\nconst addStrings = (s1, s2) =\u003e s1 + s2;\n```\n\nLoser:\n```js\nconst addStrings = (s1, s2) =\u003e s1.concat(s2);\n```\n\n\n## lib/perfFunctions.mjs\n\nModule implementing the faster functions\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstringmanolo%2Fjavascript-performance-study","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fstringmanolo%2Fjavascript-performance-study","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstringmanolo%2Fjavascript-performance-study/lists"}