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epriestley 2ad15c499a Don't compute intraline diffs if the input fails a coarse check for being huge
Summary:
Fixes T11744. Because intraline diffs are expensive to generate, we already bail out and decline to generate them for very long lines.

However, we currently split the inputs into lists of characters first, then check how long they are and make a decision to bail. For //huge// inputs (e.g., 1MB+), this is too late: just splitting them has a large CPU/RAM cost.

(These inputs are rare in normal source, but can appear in, e.g., JSON files written without newlines.)

Instead, add an extra "are the inputs really huge?" check first, and bail early if they are.

Test Plan:
  - Generated a 1MB "change a file full of Q to a file full of R" diff.
  - Before change: purged changeset cache; took about 7 seconds to load.
  - After change: purged changeset cache; took about 1 second to load.
  - Viewed some normal diffs to make sure intraline edits still displayed correctly.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T11744

Differential Revision: https://secure.phabricator.com/D16683
2016-10-07 07:42:19 -07:00
bin Added ArcanistTextLinter::LINT_BOF_WHITESPACE and ArcanistTextLinter::LINT_EOF_WHITESPACE 2014-01-13 18:05:42 -08:00
externals Don't bundle PEP8 2015-05-20 07:03:22 +10:00
resources Add some more spelling corrections to Spelling linter 2014-12-22 16:08:02 -08:00
scripts Use an HTTPEngineExtension to implement "https.blindly-trust-domains" in Arcanist 2016-06-09 12:02:15 -07:00
src Don't compute intraline diffs if the input fails a coarse check for being huge 2016-10-07 07:42:19 -07:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig in Arcanist 2016-08-03 08:13:09 -07:00
.arclint Fold ArcanistPhutilXHPASTLinter into ArcanistXHPASTLinter 2015-11-13 07:08:40 +11:00
.arcunit Rough version of configuration driven unit test engine 2015-08-11 06:54:16 +10:00
.editorconfig Test XHPAST linter rules in isolation 2015-11-19 08:57:23 +11:00
.gitignore Update .gitignore. 2014-06-14 11:44:38 -07:00
LICENSE Fix text lint issues 2015-04-07 18:09:27 +10:00
NOTICE Remove duplicate newline 2014-07-17 08:25:22 +10:00
README.md Move README to Markdown 2015-04-13 13:01:16 -07:00

Arcanist is the command-line tool for Phabricator. It allows you to interact with Phabricator installs to send code for review, download patches, transfer files, view status, make API calls, and various other things. You can read more in the User Guide

For more information about Phabricator, see http://phabricator.org/.

LICENSE

Arcanist is released under the Apache 2.0 license except as otherwise noted.