{"action":"created","issue":{"url":"https://api.github.com/repos/facebookincubator/create-react-app/issues/920","repository_url":"https://api.github.com/repos/facebookincubator/create-react-app","labels_url":"https://api.github.com/repos/facebookincubator/create-react-app/issues/920/labels{/name}","comments_url":"https://api.github.com/repos/facebookincubator/create-react-app/issues/920/comments","events_url":"https://api.github.com/repos/facebookincubator/create-react-app/issues/920/events","html_url":"https://github.com/facebookincubator/create-react-app/issues/920","id":183459656,"number":920,"title":"Really poor performance with Firefox","user":{"login":"ekaradon","id":9439390,"avatar_url":"https://avatars.githubusercontent.com/u/9439390?v=3","gravatar_id":"","url":"https://api.github.com/users/ekaradon","html_url":"https://github.com/ekaradon","followers_url":"https://api.github.com/users/ekaradon/followers","following_url":"https://api.github.com/users/ekaradon/following{/other_user}","gists_url":"https://api.github.com/users/ekaradon/gists{/gist_id}","starred_url":"https://api.github.com/users/ekaradon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ekaradon/subscriptions","organizations_url":"https://api.github.com/users/ekaradon/orgs","repos_url":"https://api.github.com/users/ekaradon/repos","events_url":"https://api.github.com/users/ekaradon/events{/privacy}","received_events_url":"https://api.github.com/users/ekaradon/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":7,"created_at":"2016-10-17T16:10:23Z","updated_at":"2016-11-20T17:28:13Z","closed_at":"2016-11-20T17:28:13Z","body":"### Description\n\nI really like this tool and I use it for all my current projects. I have however a major trouble. \nIndeed, when using Firefox with the debugger opened, it just become really slow and it may even freeze as soon as the project fatten.\nFor example, here with the default project, not even changed: \n![spectacle j13867](https://cloud.githubusercontent.com/assets/9439390/19445155/6f0ffd46-9493-11e6-890a-b49121331d06.png)\nOn this test, I have lost the control of my browser for more than 2 seconds!\n### Expected behavior\n\nUsing Chromium or Firefox should not have a major impact on the performance.\n### Actual behavior\n\nUsing Firefox debugging tools is impossible with the react-app-cli solution. \nWith my previous tools and the same level of features, it was totally usable. \n### Environment\n\n```\n➜  demo npm ls react-scripts\ndemo@0.1.0 /home/ekaradon/projects/comwatt/demo\n└── react-scripts@0.6.1 \n➜  demo node -v\nv6.8.1\n➜  demo npm -v\n3.10.8\n➜  demo uname -a\nLinux das_computer 4.7.6-1-ARCH #1 SMP PREEMPT Fri Sep 30 19:28:42 CEST 2016 x86_64 GNU/Linux\n➜  demo firefox -v\nMozilla Firefox 49.0.1\n➜  demo cat /proc/cpuinfo \nprocessor       : 0\nvendor_id       : GenuineIntel\ncpu family      : 6\nmodel           : 94\nmodel name      : Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz\n➜  demo cat /proc/meminfo \nMemTotal:       16330532 kB\nMemFree:         1327896 kB\nMemAvailable:    8083516 kB\nBuffers:          275356 kB\nCached:          7654904 kB\n\n```\n### Reproducible Demo\n\nIt is fully reproducible with the standard app created by `create-react-app` tool.\nYou just have then to start the application with:\n`➜  demo npm start`\nAnd then, inside Firefox, open the debugging tools (F12) and refresh the page (F5) and watch how much times it get you to have the page displayed. \n\nCheers, \n"},"comment":{"url":"https://api.github.com/repos/facebookincubator/create-react-app/issues/comments/261791880","html_url":"https://github.com/facebookincubator/create-react-app/issues/920#issuecomment-261791880","issue_url":"https://api.github.com/repos/facebookincubator/create-react-app/issues/920","id":261791880,"user":{"login":"gaearon","id":810438,"avatar_url":"https://avatars.githubusercontent.com/u/810438?v=3","gravatar_id":"","url":"https://api.github.com/users/gaearon","html_url":"https://github.com/gaearon","followers_url":"https://api.github.com/users/gaearon/followers","following_url":"https://api.github.com/users/gaearon/following{/other_user}","gists_url":"https://api.github.com/users/gaearon/gists{/gist_id}","starred_url":"https://api.github.com/users/gaearon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gaearon/subscriptions","organizations_url":"https://api.github.com/users/gaearon/orgs","repos_url":"https://api.github.com/users/gaearon/repos","events_url":"https://api.github.com/users/gaearon/events{/privacy}","received_events_url":"https://api.github.com/users/gaearon/received_events","type":"User","site_admin":false},"created_at":"2016-11-20T17:28:13Z","updated_at":"2016-11-20T17:28:13Z","body":"Fixed via #924, will be out in 0.8.0."}}
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