{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/issues/353","repository_url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl","labels_url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/issues/353/labels{/name}","comments_url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/issues/353/comments","events_url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/issues/353/events","html_url":"https://github.com/JuliaDiff/ForwardDiff.jl/pull/353","id":355865237,"node_id":"MDExOlB1bGxSZXF1ZXN0MjEyMjkzNzMy","number":353,"title":"Broadcast views to avoid allocations.","user":{"login":"maleadt","id":383068,"node_id":"MDQ6VXNlcjM4MzA2OA==","avatar_url":"https://avatars3.githubusercontent.com/u/383068?v=4","gravatar_id":"","url":"https://api.github.com/users/maleadt","html_url":"https://github.com/maleadt","followers_url":"https://api.github.com/users/maleadt/followers","following_url":"https://api.github.com/users/maleadt/following{/other_user}","gists_url":"https://api.github.com/users/maleadt/gists{/gist_id}","starred_url":"https://api.github.com/users/maleadt/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/maleadt/subscriptions","organizations_url":"https://api.github.com/users/maleadt/orgs","repos_url":"https://api.github.com/users/maleadt/repos","events_url":"https://api.github.com/users/maleadt/events{/privacy}","received_events_url":"https://api.github.com/users/maleadt/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2018-08-31T07:12:00Z","updated_at":"2018-09-10T15:07:49Z","closed_at":null,"author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/pulls/353","html_url":"https://github.com/JuliaDiff/ForwardDiff.jl/pull/353","diff_url":"https://github.com/JuliaDiff/ForwardDiff.jl/pull/353.diff","patch_url":"https://github.com/JuliaDiff/ForwardDiff.jl/pull/353.patch"},"body":"Improves https://github.com/JuliaDiff/ForwardDiff.jl/pull/351, ref https://github.com/JuliaLang/METADATA.jl/pull/17515#issuecomment-417561335"},"comment":{"url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/issues/comments/419947440","html_url":"https://github.com/JuliaDiff/ForwardDiff.jl/pull/353#issuecomment-419947440","issue_url":"https://api.github.com/repos/JuliaDiff/ForwardDiff.jl/issues/353","id":419947440,"node_id":"MDEyOklzc3VlQ29tbWVudDQxOTk0NzQ0MA==","user":{"login":"jrevels","id":3277443,"node_id":"MDQ6VXNlcjMyNzc0NDM=","avatar_url":"https://avatars2.githubusercontent.com/u/3277443?v=4","gravatar_id":"","url":"https://api.github.com/users/jrevels","html_url":"https://github.com/jrevels","followers_url":"https://api.github.com/users/jrevels/followers","following_url":"https://api.github.com/users/jrevels/following{/other_user}","gists_url":"https://api.github.com/users/jrevels/gists{/gist_id}","starred_url":"https://api.github.com/users/jrevels/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jrevels/subscriptions","organizations_url":"https://api.github.com/users/jrevels/orgs","repos_url":"https://api.github.com/users/jrevels/repos","events_url":"https://api.github.com/users/jrevels/events{/privacy}","received_events_url":"https://api.github.com/users/jrevels/received_events","type":"User","site_admin":false},"created_at":"2018-09-10T15:07:49Z","updated_at":"2018-09-10T15:07:49Z","author_association":"MEMBER","body":"Nice!\r\n\r\n> How performance sensitive is seed!?\r\n\r\nIt gets called in the \"inner loop\" of the pertubation chunking algorithms for API functions e.g. `ForwardDiff.gradient!`. Timing-wise, the performance impact of `seed!` is hugely dependent on the target function and input/output dimensions. We unfortunately can't let it allocate, since doing so breaks an existing ForwardDiff use case (repeated/rapid computation of small Jacobians, desirable for e.g. real-time control/optimization where memory is limited)."}}
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