commit 3384c56bc0a6b2982282f8850af6c232ec98135e
author Max Moroz <mmoroz@chromium.org> Thu Mar 14 17:49:27 2019 +0000
committer Max Moroz <mmoroz@chromium.org> Thu Mar 14 17:49:27 2019 +0000
tree fc44d68310dc880316e5f4ea48294f9475fd0926
parent 587de2cafa83c6b8589655dcf77f9b7cf0bd3bc5

Speeding up llvm-cov export with multithreaded renderFiles implementation.

Summary:
CoverageExporterJson::renderFiles accounts for most of the execution time given a large profdata file with multiple binaries.

Proposed solution is to generate JSON for each file in parallel and sort at the end to preserve deterministic output. Also added flags to skip generating parts of the output to trim the output size.

Patch by Sajjad Mirza (@sajjadm).

Reviewers: Dor1s, vsk

Reviewed By: Dor1s, vsk

Subscribers: liaoyuke, mgrang, jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59277

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356178 91177308-0d34-0410-b5e6-96231b3b80d8