ydb/library/cpp/yt, branch main

YT-22593: Reduce TString usage in core/misc

2026-06-06T22:31:50Z

commit_hash:ba8c42476d6274212745348071682042e780037f

Cache process/thread id getters and use them in TError origin capture

2026-06-06T21:16:49Z

## Motivation Profiling the YT master Automaton thread showed TOriginAttributes::Capture (run on every non-OK TError) spending ~60% of its time in a getpid() syscall — uncached on glibc >= 2.25. NYT::GetCurrentThreadId() (gettid) feeds hot thread-affinity / log-manager checks on the same thread. ## Changes - New library/cpp/yt/system/process_id.* with cached GetProcessId(); GetSystemThreadId() now caches the kernel tid in TLS. Both caches reset in the child after fork. - Moved thread_name.{h,cpp} from misc to system. - Removed GetCurrentProcessId/GetCurrentThreadId shims from yt/yt/core/misc/proc.{h,cpp}; migrated all callers to NYT::GetProcessId / NYT::GetSystemThreadId. - TOriginAttributes::Capture uses the cached getters; recorded Tid is now the real kernel tid (matches perf/ps). - Added microbenchmarks (library/cpp/yt/system/benchmarks, yt/yt/core/benchmarks/error.cpp). ## Microbenchmarks (release) | | before | after | |---|---|---| | getpid | 101 ns | 0.33 ns | | gettid | 102 ns | 1.64 ns | | Capture | 161 ns | 50 ns | | failed TError | 221 ns | 74 ns | commit_hash:ee37ae57d61a5a2dd33daee935270f4bb93b7ff9

Generalize GetEnvValueOrThrow with a typed conversion overload

2026-06-03T08:26:50Z

Add a templated GetEnvValueOrThrow that parses the environment variable value via FromString, next to the existing std::string overload. commit_hash:0421b0463c473c8c7f88c0b1619484e52b002897

YT: Add formatter for all protobuf enums

2026-06-02T10:59:36Z

commit_hash:58bf07dcff4aac728a67e0607d2c3b49ad1feef1

Cosmetics: fix typos in docstrings and comments

2026-05-29T12:48:40Z

Fix typos in docstrings --- Pull Request resolved: https://github.com/ytsaurus/ytsaurus/pull/1733 Co-authored-by: ilyaibraev commit_hash:33a12aeaeeaec2f93ef9f465a3d5cdff95b62757

YT-26105: Make TError aware of ::TSystemError

2026-05-25T08:19:52Z

commit_hash:ca6efe06865fe9fc9ebfd5ca8bbd79c2acbb4ff3

Use std::invoke to call std::invokable in TAtomicObject::Transform

2026-05-22T10:49:27Z

commit_hash:699e7e9a27bcf1220bbe3e408349a36a50408644

Remove excess blank line

2026-05-19T01:15:02Z

commit_hash:fff41cdbc1400a312067a6517c334440404c662b

YT-22593: Migrate yt/yt/ytree to std::string

2026-05-18T15:44:09Z

commit_hash:3466775b052bc8a85a2aa85e9605968e7a5ea025

Fix babenko-issues

2026-05-12T08:18:13Z

commit_hash:2728816c79b29fccf31698e16733a0220fd3069e