{"action":"created","comment":{"url":"https://api.github.com/repos/dotnet/roslyn/pulls/comments/46716180","id":46716180,"diff_hunk":"@@ -10,45 +10,54 @@ namespace Microsoft.CodeAnalysis.Text\n {\n     internal sealed class ChangedText : SourceText\n     {\n-        private readonly SourceText _oldText;\n         private readonly SourceText _newText;\n+\n+        // store old text weakly so we don't form unwanted chains of old texts (especially chains of ChangedTexts)","path":"src/Compilers/Core/Portable/Text/ChangedText.cs","position":7,"original_position":7,"commit_id":"2086bca12de9b867b23eefeddceab362f32bf9b1","original_commit_id":"2086bca12de9b867b23eefeddceab362f32bf9b1","user":{"login":"jasonmalinowski","id":201340,"avatar_url":"https://avatars.githubusercontent.com/u/201340?v=3","gravatar_id":"","url":"https://api.github.com/users/jasonmalinowski","html_url":"https://github.com/jasonmalinowski","followers_url":"https://api.github.com/users/jasonmalinowski/followers","following_url":"https://api.github.com/users/jasonmalinowski/following{/other_user}","gists_url":"https://api.github.com/users/jasonmalinowski/gists{/gist_id}","starred_url":"https://api.github.com/users/jasonmalinowski/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jasonmalinowski/subscriptions","organizations_url":"https://api.github.com/users/jasonmalinowski/orgs","repos_url":"https://api.github.com/users/jasonmalinowski/repos","events_url":"https://api.github.com/users/jasonmalinowski/events{/privacy}","received_events_url":"https://api.github.com/users/jasonmalinowski/received_events","type":"User","site_admin":false},"body":"XML doc comments?","created_at":"2015-12-04T18:45:21Z","updated_at":"2015-12-04T18:45:21Z","html_url":"https://github.com/dotnet/roslyn/pull/7219#discussion_r46716180","pull_request_url":"https://api.github.com/repos/dotnet/roslyn/pulls/7219","_links":{"self":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/comments/46716180"},"html":{"href":"https://github.com/dotnet/roslyn/pull/7219#discussion_r46716180"},"pull_request":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/7219"}}},"pull_request":{"url":"https://api.github.com/repos/dotnet/roslyn/pulls/7219","id":52606842,"html_url":"https://github.com/dotnet/roslyn/pull/7219","diff_url":"https://github.com/dotnet/roslyn/pull/7219.diff","patch_url":"https://github.com/dotnet/roslyn/pull/7219.patch","issue_url":"https://api.github.com/repos/dotnet/roslyn/issues/7219","number":7219,"state":"open","locked":false,"title":"Add support for using SourceText like a text buffer","user":{"login":"mattwar","id":3387305,"avatar_url":"https://avatars.githubusercontent.com/u/3387305?v=3","gravatar_id":"","url":"https://api.github.com/users/mattwar","html_url":"https://github.com/mattwar","followers_url":"https://api.github.com/users/mattwar/followers","following_url":"https://api.github.com/users/mattwar/following{/other_user}","gists_url":"https://api.github.com/users/mattwar/gists{/gist_id}","starred_url":"https://api.github.com/users/mattwar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattwar/subscriptions","organizations_url":"https://api.github.com/users/mattwar/orgs","repos_url":"https://api.github.com/users/mattwar/repos","events_url":"https://api.github.com/users/mattwar/events{/privacy}","received_events_url":"https://api.github.com/users/mattwar/received_events","type":"User","site_admin":false},"body":"fixes #7218\r\n\r\nThis change makes it feasible to use SourceText's (string text or large text) in scenarios where you might otherwise have used a text buffer, such as prolonged edits like typing in documents.\r\n\r\nIt fixes the backward chaining of edits by only storing the prior edit with a weak reference, and fixes the API's that traverse back along that link.  \r\n\r\nThe change also introduces policy on retaining text segments.  \r\n\r\n1. If the edit produces too many text segments, contiguous ones are consolidated together into new segments, preferring aggregation of smaller segments over larger ones.  This keeps the allocation and copying of new buffers to a minimum and makes larger consolidation a rare event.\r\n\r\n2. If the edit produces an group of segments that reference too little of their original buffers, then the whole lot will be consolidated into a new buffer. This makes it so that deletion of large blocks of text eventually results in less text in buffers (after GC), but this also only happens rarely as it is only triggered when a threshold is reached.\r\n\r\n3. If and when large texts are consolidated into new large texts, existing chunks are reused if possible.\r\n\r\n\r\n@Pilchie @DustinCampbell @dpoeschl @jasonmalinowski @rchande @CyrusNajmabadi @gafter @VSadov please review","created_at":"2015-12-03T23:06:43Z","updated_at":"2015-12-04T18:45:21Z","closed_at":null,"merged_at":null,"merge_commit_sha":"62811fe27370389be8968120ab18bc5fe2230709","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/dotnet/roslyn/pulls/7219/commits","review_comments_url":"https://api.github.com/repos/dotnet/roslyn/pulls/7219/comments","review_comment_url":"https://api.github.com/repos/dotnet/roslyn/pulls/comments{/number}","comments_url":"https://api.github.com/repos/dotnet/roslyn/issues/7219/comments","statuses_url":"https://api.github.com/repos/dotnet/roslyn/statuses/2086bca12de9b867b23eefeddceab362f32bf9b1","head":{"label":"mattwar:texture","ref":"texture","sha":"2086bca12de9b867b23eefeddceab362f32bf9b1","user":{"login":"mattwar","id":3387305,"avatar_url":"https://avatars.githubusercontent.com/u/3387305?v=3","gravatar_id":"","url":"https://api.github.com/users/mattwar","html_url":"https://github.com/mattwar","followers_url":"https://api.github.com/users/mattwar/followers","following_url":"https://api.github.com/users/mattwar/following{/other_user}","gists_url":"https://api.github.com/users/mattwar/gists{/gist_id}","starred_url":"https://api.github.com/users/mattwar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattwar/subscriptions","organizations_url":"https://api.github.com/users/mattwar/orgs","repos_url":"https://api.github.com/users/mattwar/repos","events_url":"https://api.github.com/users/mattwar/events{/privacy}","received_events_url":"https://api.github.com/users/mattwar/received_events","type":"User","site_admin":false},"repo":{"id":30200787,"name":"roslyn","full_name":"mattwar/roslyn","owner":{"login":"mattwar","id":3387305,"avatar_url":"https://avatars.githubusercontent.com/u/3387305?v=3","gravatar_id":"","url":"https://api.github.com/users/mattwar","html_url":"https://github.com/mattwar","followers_url":"https://api.github.com/users/mattwar/followers","following_url":"https://api.github.com/users/mattwar/following{/other_user}","gists_url":"https://api.github.com/users/mattwar/gists{/gist_id}","starred_url":"https://api.github.com/users/mattwar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattwar/subscriptions","organizations_url":"https://api.github.com/users/mattwar/orgs","repos_url":"https://api.github.com/users/mattwar/repos","events_url":"https://api.github.com/users/mattwar/events{/privacy}","received_events_url":"https://api.github.com/users/mattwar/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/mattwar/roslyn","description":"The .NET Compiler Platform (\"Roslyn\") provides open-source C# and Visual Basic compilers with rich code analysis APIs.","fork":true,"url":"https://api.github.com/repos/mattwar/roslyn","forks_url":"https://api.github.com/repos/mattwar/roslyn/forks","keys_url":"https://api.github.com/repos/mattwar/roslyn/keys{/key_id}","collaborators_url":"https://api.github.com/repos/mattwar/roslyn/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/mattwar/roslyn/teams","hooks_url":"https://api.github.com/repos/mattwar/roslyn/hooks","issue_events_url":"https://api.github.com/repos/mattwar/roslyn/issues/events{/number}","events_url":"https://api.github.com/repos/mattwar/roslyn/events","assignees_url":"https://api.github.com/repos/mattwar/roslyn/assignees{/user}","branches_url":"https://api.github.com/repos/mattwar/roslyn/branches{/branch}","tags_url":"https://api.github.com/repos/mattwar/roslyn/tags","blobs_url":"https://api.github.com/repos/mattwar/roslyn/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/mattwar/roslyn/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/mattwar/roslyn/git/refs{/sha}","trees_url":"https://api.github.com/repos/mattwar/roslyn/git/trees{/sha}","statuses_url":"https://api.github.com/repos/mattwar/roslyn/statuses/{sha}","languages_url":"https://api.github.com/repos/mattwar/roslyn/languages","stargazers_url":"https://api.github.com/repos/mattwar/roslyn/stargazers","contributors_url":"https://api.github.com/repos/mattwar/roslyn/contributors","subscribers_url":"https://api.github.com/repos/mattwar/roslyn/subscribers","subscription_url":"https://api.github.com/repos/mattwar/roslyn/subscription","commits_url":"https://api.github.com/repos/mattwar/roslyn/commits{/sha}","git_commits_url":"https://api.github.com/repos/mattwar/roslyn/git/commits{/sha}","comments_url":"https://api.github.com/repos/mattwar/roslyn/comments{/number}","issue_comment_url":"https://api.github.com/repos/mattwar/roslyn/issues/comments{/number}","contents_url":"https://api.github.com/repos/mattwar/roslyn/contents/{+path}","compare_url":"https://api.github.com/repos/mattwar/roslyn/compare/{base}...{head}","merges_url":"https://api.github.com/repos/mattwar/roslyn/merges","archive_url":"https://api.github.com/repos/mattwar/roslyn/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/mattwar/roslyn/downloads","issues_url":"https://api.github.com/repos/mattwar/roslyn/issues{/number}","pulls_url":"https://api.github.com/repos/mattwar/roslyn/pulls{/number}","milestones_url":"https://api.github.com/repos/mattwar/roslyn/milestones{/number}","notifications_url":"https://api.github.com/repos/mattwar/roslyn/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/mattwar/roslyn/labels{/name}","releases_url":"https://api.github.com/repos/mattwar/roslyn/releases{/id}","created_at":"2015-02-02T18:12:54Z","updated_at":"2015-05-01T19:32:18Z","pushed_at":"2015-12-03T22:46:01Z","git_url":"git://github.com/mattwar/roslyn.git","ssh_url":"git@github.com:mattwar/roslyn.git","clone_url":"https://github.com/mattwar/roslyn.git","svn_url":"https://github.com/mattwar/roslyn","homepage":"","size":116656,"stargazers_count":0,"watchers_count":0,"language":"C#","has_issues":false,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":0,"mirror_url":null,"open_issues_count":0,"forks":0,"open_issues":0,"watchers":0,"default_branch":"master"}},"base":{"label":"dotnet:master","ref":"master","sha":"b269808c541020228cdf2fc38a98f3ca5d46a15e","user":{"login":"dotnet","id":9141961,"avatar_url":"https://avatars.githubusercontent.com/u/9141961?v=3","gravatar_id":"","url":"https://api.github.com/users/dotnet","html_url":"https://github.com/dotnet","followers_url":"https://api.github.com/users/dotnet/followers","following_url":"https://api.github.com/users/dotnet/following{/other_user}","gists_url":"https://api.github.com/users/dotnet/gists{/gist_id}","starred_url":"https://api.github.com/users/dotnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dotnet/subscriptions","organizations_url":"https://api.github.com/users/dotnet/orgs","repos_url":"https://api.github.com/users/dotnet/repos","events_url":"https://api.github.com/users/dotnet/events{/privacy}","received_events_url":"https://api.github.com/users/dotnet/received_events","type":"Organization","site_admin":false},"repo":{"id":29078997,"name":"roslyn","full_name":"dotnet/roslyn","owner":{"login":"dotnet","id":9141961,"avatar_url":"https://avatars.githubusercontent.com/u/9141961?v=3","gravatar_id":"","url":"https://api.github.com/users/dotnet","html_url":"https://github.com/dotnet","followers_url":"https://api.github.com/users/dotnet/followers","following_url":"https://api.github.com/users/dotnet/following{/other_user}","gists_url":"https://api.github.com/users/dotnet/gists{/gist_id}","starred_url":"https://api.github.com/users/dotnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dotnet/subscriptions","organizations_url":"https://api.github.com/users/dotnet/orgs","repos_url":"https://api.github.com/users/dotnet/repos","events_url":"https://api.github.com/users/dotnet/events{/privacy}","received_events_url":"https://api.github.com/users/dotnet/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/dotnet/roslyn","description":"The .NET Compiler Platform (\"Roslyn\") provides open-source C# and Visual Basic compilers with rich code analysis APIs.","fork":false,"url":"https://api.github.com/repos/dotnet/roslyn","forks_url":"https://api.github.com/repos/dotnet/roslyn/forks","keys_url":"https://api.github.com/repos/dotnet/roslyn/keys{/key_id}","collaborators_url":"https://api.github.com/repos/dotnet/roslyn/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/dotnet/roslyn/teams","hooks_url":"https://api.github.com/repos/dotnet/roslyn/hooks","issue_events_url":"https://api.github.com/repos/dotnet/roslyn/issues/events{/number}","events_url":"https://api.github.com/repos/dotnet/roslyn/events","assignees_url":"https://api.github.com/repos/dotnet/roslyn/assignees{/user}","branches_url":"https://api.github.com/repos/dotnet/roslyn/branches{/branch}","tags_url":"https://api.github.com/repos/dotnet/roslyn/tags","blobs_url":"https://api.github.com/repos/dotnet/roslyn/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/dotnet/roslyn/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/dotnet/roslyn/git/refs{/sha}","trees_url":"https://api.github.com/repos/dotnet/roslyn/git/trees{/sha}","statuses_url":"https://api.github.com/repos/dotnet/roslyn/statuses/{sha}","languages_url":"https://api.github.com/repos/dotnet/roslyn/languages","stargazers_url":"https://api.github.com/repos/dotnet/roslyn/stargazers","contributors_url":"https://api.github.com/repos/dotnet/roslyn/contributors","subscribers_url":"https://api.github.com/repos/dotnet/roslyn/subscribers","subscription_url":"https://api.github.com/repos/dotnet/roslyn/subscription","commits_url":"https://api.github.com/repos/dotnet/roslyn/commits{/sha}","git_commits_url":"https://api.github.com/repos/dotnet/roslyn/git/commits{/sha}","comments_url":"https://api.github.com/repos/dotnet/roslyn/comments{/number}","issue_comment_url":"https://api.github.com/repos/dotnet/roslyn/issues/comments{/number}","contents_url":"https://api.github.com/repos/dotnet/roslyn/contents/{+path}","compare_url":"https://api.github.com/repos/dotnet/roslyn/compare/{base}...{head}","merges_url":"https://api.github.com/repos/dotnet/roslyn/merges","archive_url":"https://api.github.com/repos/dotnet/roslyn/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/dotnet/roslyn/downloads","issues_url":"https://api.github.com/repos/dotnet/roslyn/issues{/number}","pulls_url":"https://api.github.com/repos/dotnet/roslyn/pulls{/number}","milestones_url":"https://api.github.com/repos/dotnet/roslyn/milestones{/number}","notifications_url":"https://api.github.com/repos/dotnet/roslyn/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/dotnet/roslyn/labels{/name}","releases_url":"https://api.github.com/repos/dotnet/roslyn/releases{/id}","created_at":"2015-01-11T02:39:03Z","updated_at":"2015-12-04T18:12:59Z","pushed_at":"2015-12-04T18:21:33Z","git_url":"git://github.com/dotnet/roslyn.git","ssh_url":"git@github.com:dotnet/roslyn.git","clone_url":"https://github.com/dotnet/roslyn.git","svn_url":"https://github.com/dotnet/roslyn","homepage":"","size":142685,"stargazers_count":3903,"watchers_count":3903,"language":"C#","has_issues":true,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":957,"mirror_url":null,"open_issues_count":1730,"forks":957,"open_issues":1730,"watchers":3903,"default_branch":"master"}},"_links":{"self":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/7219"},"html":{"href":"https://github.com/dotnet/roslyn/pull/7219"},"issue":{"href":"https://api.github.com/repos/dotnet/roslyn/issues/7219"},"comments":{"href":"https://api.github.com/repos/dotnet/roslyn/issues/7219/comments"},"review_comments":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/7219/comments"},"review_comment":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/comments{/number}"},"commits":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/7219/commits"},"statuses":{"href":"https://api.github.com/repos/dotnet/roslyn/statuses/2086bca12de9b867b23eefeddceab362f32bf9b1"}}}}