tdlight-team/tdlight
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Optimize logging to NULL on Windows. Fixes #2112.

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It is possible to do only about 100 writes to NULL per second, which is about 8-80 times less than even performance of writes to a console app.
This commit is contained in:
levlam 2022-10-03 15:11:23 +03:00
parent 10680fe353
commit 628b8901bc
2 changed files with 13 additions and 4 deletions
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6
tdutils/td/utils/port/StdStreams.cpp
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@ -46,9 +46,11 @@ static FileFd &get_file_fd() {
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
static auto handle = GetStdHandle(id);
LOG_IF(FATAL, handle == INVALID_HANDLE_VALUE) << "Failed to GetStdHandle " << id;
static FileFd result = FileFd::from_native_fd(NativeFd(handle, true));
static FileFd result = handle == nullptr ? FileFd() : FileFd::from_native_fd(NativeFd(handle, true));
static auto guard = ScopeExit() + [&] {
result.move_as_native_fd().release();
if (handle != nullptr) {
result.move_as_native_fd().release();
}
};
#else
static FileFd result;

11
tdutils/test/log.cpp
View File

@ -43,6 +43,9 @@ class LogBenchmark final : public td::Benchmark {
threads_.resize(threads_n_);
}
void tear_down() final {
if (log_ == nullptr) {
return;
}
for (const auto &path : log_->get_file_paths()) {
td::unlink(path).ignore();
}
@ -50,7 +53,9 @@ class LogBenchmark final : public td::Benchmark {
}
void run(int n) final {
auto old_log_interface = td::log_interface;
td::log_interface = log_.get();
if (log_ != nullptr) {
td::log_interface = log_.get();
}
for (auto &thread : threads_) {
thread = td::thread([this, n] { this->run_thread(n); });
@ -65,7 +70,7 @@ class LogBenchmark final : public td::Benchmark {
void run_thread(int n) {
auto str = PSTRING() << "#" << n << " : fsjklfdjsklfjdsklfjdksl\n";
for (int i = 0; i < n; i++) {
if (i % 10000 == 0) {
if (i % 10000 == 0 && log_ != nullptr) {
log_->after_rotation();
}
if (test_full_logging_) {
@ -97,6 +102,8 @@ static void bench_log(std::string name, F &&f) {
TEST(Log, Bench) {
bench_log("NullLog", [] { return td::make_unique<td::NullLog>(); });
// bench_log("Default", []() -> td::unique_ptr<td::NullLog> { return nullptr; });
bench_log("MemoryLog", [] { return td::make_unique<td::MemoryLog<1 << 20>>(); });
bench_log("CombinedLogEmpty", [] { return td::make_unique<td::CombinedLog>(); });