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perf: use absl::flat_hash_map instead of std::unordered_map (#46217)

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* perf: make ElectronUsbDelegate::controller_map_ an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make ElectronSerialDelegate::controller_map_ an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make ElectronHidDelegate::controller_map_ an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make FrameTreeNodeIdMap an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make AutofillDriverFactory::driver_map_ an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make asar::Archive::external_files_ an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make VersionIdMap an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: make ObjectCache::proxy_map_ an absl::flat_hash_map

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* docs: add TODO to investigate absl map in KeyWeakMap

Co-authored-by: Charles Kerr <charles@charleskerr.com>

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
This commit is contained in:
trop[bot] 2025-03-24 09:30:52 -05:00 • committed by GitHub
parent e1b2b8ef0c
commit 76fa5b7af1
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9 changed files with 24 additions and 24 deletions
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6
shell/common/asar/archive.h
View file

@ -8,7 +8,6 @@
#include <memory>
#include <optional>
#include <string>
#include <unordered_map>
#include <vector>
#include <uv.h>
@ -17,6 +16,7 @@
#include "base/files/file_path.h"
#include "base/synchronization/lock.h"
#include "base/values.h"
#include "third_party/abseil-cpp/absl/container/flat_hash_map.h"
namespace asar {
@ -110,8 +110,8 @@ class Archive {
// Cached external temporary files.
base::Lock external_files_lock_;
std::unordered_map<base::FilePath::StringType,
std::unique_ptr<ScopedTemporaryFile>>
absl::flat_hash_map<base::FilePath::StringType,
std::unique_ptr<ScopedTemporaryFile>>
external_files_;
};

1
shell/common/key_weak_map.h
View file

@ -69,6 +69,7 @@ class KeyWeakMap {
}
// Map of stored objects.
// TODO(ckerr): can absl::flat_hash_map be used safely here?
std::unordered_map<K, Mapped> map_;
};