Skip to content
Permalink
Browse files

http2: shrink default `vector::reserve()` allocations

Allocating memory upfront comes with overhead, and in particular,
`std::vector` implementations do not necessarily return memory
to the system when one might expect that (e.g. after shrinking the
vector).

PR-URL: #29122
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
  • Loading branch information...
addaleax authored and targos committed Aug 10, 2019
1 parent 4f10ac3 commit 23b0db58ca7ff06c121771448fb7305aad6e513b
Showing with 2 additions and 2 deletions.
  1. +2 −2 src/node_http2.cc
@@ -639,7 +639,7 @@ Http2Session::Http2Session(Environment* env,
// fails.
CHECK_EQ(fn(&session_, callbacks, this, *opts, *allocator_info), 0);

outgoing_storage_.reserve(4096);
outgoing_storage_.reserve(1024);
outgoing_buffers_.reserve(32);

{
@@ -1914,7 +1914,7 @@ Http2Stream::Http2Stream(Http2Session* session,
if (max_header_pairs_ == 0) {
max_header_pairs_ = DEFAULT_MAX_HEADER_LIST_PAIRS;
}
current_headers_.reserve(max_header_pairs_);
current_headers_.reserve(std::min(max_header_pairs_, 12u));

// Limit the number of header octets
max_header_length_ =

0 comments on commit 23b0db5

Please sign in to comment.
You can’t perform that action at this time.