{"action":"created","issue":{"url":"https://api.github.com/repos/angular/angular/issues/4204","labels_url":"https://api.github.com/repos/angular/angular/issues/4204/labels{/name}","comments_url":"https://api.github.com/repos/angular/angular/issues/4204/comments","events_url":"https://api.github.com/repos/angular/angular/issues/4204/events","html_url":"https://github.com/angular/angular/pull/4204","id":106677673,"number":4204,"title":"refactor(dart): use an identity map for StringMap","user":{"login":"hterkelsen","id":1961493,"avatar_url":"https://avatars.githubusercontent.com/u/1961493?v=3","gravatar_id":"","url":"https://api.github.com/users/hterkelsen","html_url":"https://github.com/hterkelsen","followers_url":"https://api.github.com/users/hterkelsen/followers","following_url":"https://api.github.com/users/hterkelsen/following{/other_user}","gists_url":"https://api.github.com/users/hterkelsen/gists{/gist_id}","starred_url":"https://api.github.com/users/hterkelsen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hterkelsen/subscriptions","organizations_url":"https://api.github.com/users/hterkelsen/orgs","repos_url":"https://api.github.com/users/hterkelsen/repos","events_url":"https://api.github.com/users/hterkelsen/events{/privacy}","received_events_url":"https://api.github.com/users/hterkelsen/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/angular/angular/labels/cla:%20yes","name":"cla: yes","color":"009800"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-09-16T01:17:19Z","updated_at":"2015-09-16T23:07:21Z","closed_at":"2015-09-16T23:07:21Z","pull_request":{"url":"https://api.github.com/repos/angular/angular/pulls/4204","html_url":"https://github.com/angular/angular/pull/4204","diff_url":"https://github.com/angular/angular/pull/4204.diff","patch_url":"https://github.com/angular/angular/pull/4204.patch"},"body":"LinkedIdentityHashMap can be faster than the standard LinkedHashMap, and will compile to the standard Es6 map in the future"},"comment":{"url":"https://api.github.com/repos/angular/angular/issues/comments/140920822","html_url":"https://github.com/angular/angular/pull/4204#issuecomment-140920822","issue_url":"https://api.github.com/repos/angular/angular/issues/4204","id":140920822,"user":{"login":"hterkelsen","id":1961493,"avatar_url":"https://avatars.githubusercontent.com/u/1961493?v=3","gravatar_id":"","url":"https://api.github.com/users/hterkelsen","html_url":"https://github.com/hterkelsen","followers_url":"https://api.github.com/users/hterkelsen/followers","following_url":"https://api.github.com/users/hterkelsen/following{/other_user}","gists_url":"https://api.github.com/users/hterkelsen/gists{/gist_id}","starred_url":"https://api.github.com/users/hterkelsen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hterkelsen/subscriptions","organizations_url":"https://api.github.com/users/hterkelsen/orgs","repos_url":"https://api.github.com/users/hterkelsen/repos","events_url":"https://api.github.com/users/hterkelsen/events{/privacy}","received_events_url":"https://api.github.com/users/hterkelsen/received_events","type":"User","site_admin":false},"created_at":"2015-09-16T23:07:20Z","updated_at":"2015-09-16T23:07:20Z","body":"This is failing because in dart2js String has the property that `a == b` => `identical(a,b)` but that is not true in the VM. The proper way to do this is for dart2js to recognize Maps with String keys and output them as IdentityLinkedHashMap"}}