{"action":"created","issue":{"url":"https://api.github.com/repos/rackt/react-router/issues/1873","labels_url":"https://api.github.com/repos/rackt/react-router/issues/1873/labels{/name}","comments_url":"https://api.github.com/repos/rackt/react-router/issues/1873/comments","events_url":"https://api.github.com/repos/rackt/react-router/issues/1873/events","html_url":"https://github.com/rackt/react-router/issues/1873","id":105895054,"number":1873,"title":"<Link> Component performance","user":{"login":"khakulov","id":441436,"avatar_url":"https://avatars.githubusercontent.com/u/441436?v=3","gravatar_id":"","url":"https://api.github.com/users/khakulov","html_url":"https://github.com/khakulov","followers_url":"https://api.github.com/users/khakulov/followers","following_url":"https://api.github.com/users/khakulov/following{/other_user}","gists_url":"https://api.github.com/users/khakulov/gists{/gist_id}","starred_url":"https://api.github.com/users/khakulov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/khakulov/subscriptions","organizations_url":"https://api.github.com/users/khakulov/orgs","repos_url":"https://api.github.com/users/khakulov/repos","events_url":"https://api.github.com/users/khakulov/events{/privacy}","received_events_url":"https://api.github.com/users/khakulov/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":7,"created_at":"2015-09-10T20:51:05Z","updated_at":"2015-09-11T08:35:38Z","closed_at":null,"body":"Im my actual project i have to render a table with 300-400 rows. Every row contains a link to another page in my app. In actual beta4 version every rerendering of my table takes 400-500ms. Master brach is much better but still first rendering is to slow.\r\n\r\nI looked deep in code by commenting out line by line the render function of Link component and realized that ```history.isActive``` takes to long to check active state of the link. Which state i don't need in my table.\r\n\r\nThe other *small* issue what i think is, that every link has onClick EventBindling. For every EventBinding browser allocates a small piece of memory. Which is no problem if the page has few links.\r\n\r\nSo i solved that problem for me, with normal html <a> Tags and old school jQuery solution one global  EventBinding on document which catches every link click and calls pushState if its realtive url (without http://):\r\n```javascript\r\n$(document).delegate('a', 'click', evt => {\r\n        if (evt.isPropagationStopped()) {\r\n            return;\r\n        }\r\n        if(clickedWithoutHoldingAnyKeyboardButton(evt) && targetIsThisWindow(evt.target)) {\r\n            let href = $(evt.target).attr(\"href\");\r\n            if (!isAbsoluteURL(href)) {\r\n                evt.preventDefault();\r\n                let [path, query] = parsePath(href);\r\n                history.navigate({}, path, query);\r\n            }\r\n        }\r\n});\r\n```"},"comment":{"url":"https://api.github.com/repos/rackt/react-router/issues/comments/139485679","html_url":"https://github.com/rackt/react-router/issues/1873#issuecomment-139485679","issue_url":"https://api.github.com/repos/rackt/react-router/issues/1873","id":139485679,"user":{"login":"knowbody","id":3802023,"avatar_url":"https://avatars.githubusercontent.com/u/3802023?v=3","gravatar_id":"","url":"https://api.github.com/users/knowbody","html_url":"https://github.com/knowbody","followers_url":"https://api.github.com/users/knowbody/followers","following_url":"https://api.github.com/users/knowbody/following{/other_user}","gists_url":"https://api.github.com/users/knowbody/gists{/gist_id}","starred_url":"https://api.github.com/users/knowbody/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/knowbody/subscriptions","organizations_url":"https://api.github.com/users/knowbody/orgs","repos_url":"https://api.github.com/users/knowbody/repos","events_url":"https://api.github.com/users/knowbody/events{/privacy}","received_events_url":"https://api.github.com/users/knowbody/received_events","type":"User","site_admin":false},"created_at":"2015-09-11T08:35:38Z","updated_at":"2015-09-11T08:35:38Z","body":"yeah I agree, until we find out how we can optimise active links we could have `<Link>` without `isActive` and something like `<NavLink>` with the `isActive` behaviour. They are pretty much only used for navigation/tabs"}}