[clang-tools-extra] f7a2612 - [clangd] Release notes for b8c37153d5393aad96

[Sam McCall via cfe-commits]

Author: Sam McCall
Date: 2020-12-22T22:58:45+01:00
New Revision: f7a26127f21fb1ca8252879ca647835ea7c5903d

URL: https://github.com/llvm/llvm-project/commit/f7a26127f21fb1ca8252879ca647835ea7c5903d
DIFF: https://github.com/llvm/llvm-project/commit/f7a26127f21fb1ca8252879ca647835ea7c5903d.diff

LOG: [clangd] Release notes for b8c37153d5393aad96

Added: 
    

Modified: 
    clang-tools-extra/docs/ReleaseNotes.rst

Removed: 
    


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diff  --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 450b80fd4581..2960aad5a556 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -47,7 +47,17 @@ Major New Features
 Improvements to clangd
 ----------------------
 
-The improvements are...
+- clangd's memory usage is significantly reduced on most Linux systems.
+  In particular, memory usage should not increase dramatically over time.
+
+  The standard allocator on most systems is glibc's ptmalloc2, and it creates
+  disproportionately large heaps when handling clangd's allocation patterns.
+  By default, clangd will now periodically call ``malloc_trim`` to release free
+  pages on glibc systems.
+
+  Users of other allocators (such as ``jemalloc`` or ``tcmalloc``) on glibc
+  systems can disable this using ``--malloc_trim=0`` or the CMake flag
+  ``-DCLANGD_MALLOC_TRIM=0``.
 
 Improvements to clang-doc
 -------------------------