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epriestley c666cb9f0b Reduce the frequency of DOM scans to rebuild inlines when scrolling revisions
Summary:
Ref T13513. See PHI1734, which raises a concern about the performance of large revisions near the 100-change threshold.

Currently, `getInlines()` is called whenever the scroll position transitions between two changesets, and it performs a relatively complicated DOM scan to lift inlines out of the document.

This shows up as taking a small but nontrivial amount of time in Firefox profiles and should be safely memoizable.

Test Plan:
  - Under Firefox profiling, scrolled through a large revision.
  - Before change: `getInlines()` appeared as the highest-cost thing we're explicitly doing on profiles.
  - After change: `getInlines()` was no longer meaningfully represented on profiles.
  - Created inlines, edited inlines, etc. Didn't identify any broken behavior.

Maniphest Tasks: T13513

Differential Revision: https://secure.phabricator.com/D21261
2020-05-15 09:37:41 -07:00
bin Remove the "ssh-auth-key" script 2019-10-28 17:52:37 -07:00
conf Remove an old digest in Celerity code and some obsolete configuration options 2019-01-04 13:43:38 -08:00
externals Merge a small amount of remaining "libphutil/" code with Phabricator, break libphutil dependency 2020-02-12 15:17:36 -08:00
resources Reduce the frequency of DOM scans to rebuild inlines when scrolling revisions 2020-05-15 09:37:41 -07:00
scripts Update a Phabricator -> Arcanist include path for scripts in Phabricator 2020-02-14 08:32:26 -08:00
src Remove code which overrides "diffusion.ssh-username" when instanced 2020-05-15 07:45:06 -07:00
support Use "@" to silence "GC list" warnings from "apc_store()" and "apcu_store()" 2020-04-28 04:13:37 -07:00
webroot Reduce the frequency of DOM scans to rebuild inlines when scrolling revisions 2020-05-15 09:37:41 -07:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig 2016-08-03 08:12:49 -07:00
.arclint Continue moving classes with no callers in libphutil or Arcanist to Phabricator 2020-02-12 13:14:04 -08:00
.arcunit Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore Make i18n string extraction faster and more flexible 2016-07-04 10:23:30 -07:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Remove push to IRC from "readme.md" too 2015-10-24 18:39:16 -07:00

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