{"action":"created","comment":{"url":"https://api.github.com/repos/highfidelity/hifi/pulls/comments/52329593","id":52329593,"diff_hunk":"@@ -50,88 +50,55 @@ void TextureMap::setLightmapOffsetScale(float offset, float scale) {\n }\n \n \n-\n-\n+// FIXME why is this in the model library?  Move to GPU or GPU_GL\n gpu::Texture* TextureUsage::create2DTextureFromImage(const QImage& srcImage, const std::string& srcImageName) {\n     QImage image = srcImage;\n- \n-    int imageArea = image.width() * image.height();","path":"libraries/model/src/model/TextureMap.cpp","position":10,"original_position":10,"commit_id":"7158a2978edad4f84c3e0dc5f072d988105bb40d","original_commit_id":"7158a2978edad4f84c3e0dc5f072d988105bb40d","user":{"login":"ZappoMan","id":2093195,"avatar_url":"https://avatars.githubusercontent.com/u/2093195?v=3","gravatar_id":"","url":"https://api.github.com/users/ZappoMan","html_url":"https://github.com/ZappoMan","followers_url":"https://api.github.com/users/ZappoMan/followers","following_url":"https://api.github.com/users/ZappoMan/following{/other_user}","gists_url":"https://api.github.com/users/ZappoMan/gists{/gist_id}","starred_url":"https://api.github.com/users/ZappoMan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ZappoMan/subscriptions","organizations_url":"https://api.github.com/users/ZappoMan/orgs","repos_url":"https://api.github.com/users/ZappoMan/repos","events_url":"https://api.github.com/users/ZappoMan/events{/privacy}","received_events_url":"https://api.github.com/users/ZappoMan/received_events","type":"User","site_admin":false},"body":"I now see you named the commit as \"don't burn CPU cycles calculating average color we don't use\"... it would make my review easier if you had included that comment in the PR so I knew to look for the change... and inline comment here would be useful.\r\n\r\nThat being said, it looks like you also changed the logic a bit. And/or there's multiple calls to `image = image.convertToFormat(QImage::Format_RGB888);` that likely can be consolidated.","created_at":"2016-02-09T16:11:21Z","updated_at":"2016-02-09T16:11:21Z","html_url":"https://github.com/highfidelity/hifi/pull/7049#discussion_r52329593","pull_request_url":"https://api.github.com/repos/highfidelity/hifi/pulls/7049","_links":{"self":{"href":"https://api.github.com/repos/highfidelity/hifi/pulls/comments/52329593"},"html":{"href":"https://github.com/highfidelity/hifi/pull/7049#discussion_r52329593"},"pull_request":{"href":"https://api.github.com/repos/highfidelity/hifi/pulls/7049"}}},"pull_request":{"url":"https://api.github.com/repos/highfidelity/hifi/pulls/7049","id":58715785,"html_url":"https://github.com/highfidelity/hifi/pull/7049","diff_url":"https://github.com/highfidelity/hifi/pull/7049.diff","patch_url":"https://github.com/highfidelity/hifi/pull/7049.patch","issue_url":"https://api.github.com/repos/highfidelity/hifi/issues/7049","number":7049,"state":"open","locked":false,"title":"Anti-stutter work","user":{"login":"jherico","id":1533642,"avatar_url":"https://avatars.githubusercontent.com/u/1533642?v=3","gravatar_id":"","url":"https://api.github.com/users/jherico","html_url":"https://github.com/jherico","followers_url":"https://api.github.com/users/jherico/followers","following_url":"https://api.github.com/users/jherico/following{/other_user}","gists_url":"https://api.github.com/users/jherico/gists{/gist_id}","starred_url":"https://api.github.com/users/jherico/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jherico/subscriptions","organizations_url":"https://api.github.com/users/jherico/orgs","repos_url":"https://api.github.com/users/jherico/repos","events_url":"https://api.github.com/users/jherico/events{/privacy}","received_events_url":"https://api.github.com/users/jherico/received_events","type":"User","site_admin":false},"body":"This is a first pass at reducing the amount of stutter caused when entering a large scene.  \r\n\r\nThe stutter appears to be caused by a number of factors.  \r\n\r\n- overloading the GPU with an excessive number of simultaneous transfers of large amount of texture / vertex data\r\n- overloading the CPU with an excessive number of parsing threads doing file IO\r\n\r\nThis PR attempts to address the latter component first, simply because it's easier.  It reduces the size of the global thread pool from the default of `QThread::idealThreadCount()` to `2`.  This means that if you have 16 textures/models to load to render a scene, only 2 of them will be concurrently being loaded from disk to CPU memory at a time.  \r\n\r\nPreviously it would allow all CPU cores to be consumed performing this task, which could starve the main thread and the present thread, preventing keyboard or mouse input from being handled, and causing the screen to simply freeze (regardless of threaded present).  \r\n\r\nBecause the number of concurrent file transfers is being limited, the GPU transfers are also partially serialized, reducing their impact as well.\r\n\r\nAs a result, when teleporting from a nearly empty domain to `hifi://demo/547.046,495.032,509.714/0,-0.29785,0,-0.954613`, the number of missed frames (caused by the main / rendering thread being blocked/starved) is reduced and the amount of complete freezes (caused by the present thread being starved) is almost completely eliminated.\r\n\r\n","created_at":"2016-02-09T08:09:45Z","updated_at":"2016-02-09T16:11:21Z","closed_at":null,"merged_at":null,"merge_commit_sha":"7494c6a51ec03dfb931a914ec41ae20a890a9d97","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/highfidelity/hifi/pulls/7049/commits","review_comments_url":"https://api.github.com/repos/highfidelity/hifi/pulls/7049/comments","review_comment_url":"https://api.github.com/repos/highfidelity/hifi/pulls/comments{/number}","comments_url":"https://api.github.com/repos/highfidelity/hifi/issues/7049/comments","statuses_url":"https://api.github.com/repos/highfidelity/hifi/statuses/7158a2978edad4f84c3e0dc5f072d988105bb40d","head":{"label":"jherico:antistutter","ref":"antistutter","sha":"7158a2978edad4f84c3e0dc5f072d988105bb40d","user":{"login":"jherico","id":1533642,"avatar_url":"https://avatars.githubusercontent.com/u/1533642?v=3","gravatar_id":"","url":"https://api.github.com/users/jherico","html_url":"https://github.com/jherico","followers_url":"https://api.github.com/users/jherico/followers","following_url":"https://api.github.com/users/jherico/following{/other_user}","gists_url":"https://api.github.com/users/jherico/gists{/gist_id}","starred_url":"https://api.github.com/users/jherico/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jherico/subscriptions","organizations_url":"https://api.github.com/users/jherico/orgs","repos_url":"https://api.github.com/users/jherico/repos","events_url":"https://api.github.com/users/jherico/events{/privacy}","received_events_url":"https://api.github.com/users/jherico/received_events","type":"User","site_admin":false},"repo":{"id":29566286,"name":"hifi","full_name":"jherico/hifi","owner":{"login":"jherico","id":1533642,"avatar_url":"https://avatars.githubusercontent.com/u/1533642?v=3","gravatar_id":"","url":"https://api.github.com/users/jherico","html_url":"https://github.com/jherico","followers_url":"https://api.github.com/users/jherico/followers","following_url":"https://api.github.com/users/jherico/following{/other_user}","gists_url":"https://api.github.com/users/jherico/gists{/gist_id}","starred_url":"https://api.github.com/users/jherico/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jherico/subscriptions","organizations_url":"https://api.github.com/users/jherico/orgs","repos_url":"https://api.github.com/users/jherico/repos","events_url":"https://api.github.com/users/jherico/events{/privacy}","received_events_url":"https://api.github.com/users/jherico/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/jherico/hifi","description":"Open, decentralized virtual worlds using sensors to control avatars and dynamically assigned devices as servers.  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