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git_commit commit 57cf1ff8d8a1acaf949d866b52b7c8841a49f46d
Author: Nikolas Klauser <nikolasklauser@berlin.de>
Date: Thu Dec 11 10:28:58 2025 +0100

[libc++] Remove initializer_list specific optimization in __tree (#169413)

We've seen in quite a few cases while optimizing `__tree`'s copy
construction that `_DetachedTreeCache` is actually quite slow and not
necessarily an optimization at all. This patch removes the code, since
it's now only used by `operator=(initializer_list)`, which should be
quite cold code. We might look into actually optimizing it again in the
future, but I doubt an optimization will be small enough compared to the
likely speedup in real-world code this would give.
Filter

ldionne-old-macbook-results test results

Run Order Start Time Duration
Current 562304 2025-12-16T16:40:01 0:00:00
Previous 562303 2025-12-16T16:40:01 0:00:00
Baseline 485288 2025-12-16T16:40:01 0:00:00


Tests Summary

Status Group # # (B)
Performance Improvements 5 0
Added Tests 0 16
Unchanged Tests 75 64
Total Tests 80

Performance Improvements - execution_time Δ Previous Current σ Δ (B) σ (B)
753_ns3_r -1.75% 10.228 10.049 - 0.00% -
706_stockfish_r -1.69% 21.576 21.211 - 0.00% -
709_cactus_r -1.09% 19.735 19.519 - 0.00% -
707_ntest_r -1.06% 16.556 16.380 - 0.00% -
727_cppcheck_r -1.01% 24.973 24.721 - 0.00% -

Added Tests - execution_time
706_stockfish_r
707_ntest_r
709_cactus_r
710_omnetpp_r
721_gcc_r
723_llvm_r
727_cppcheck_r
729_abc_r
731_astcenc_r
735_gem5_r
736_ocio_r
737_gmsh_r
748_flightdm_r
750_sealcrypto_r
753_ns3_r
766_femflow_r


Report Time: 0.10s
Name Current %
706_stockfish_r 21.211 -1.69%
707_ntest_r 16.380 -1.06%
709_cactus_r 19.519 -1.09%
710_omnetpp_r 8.997 -
721_gcc_r 12.945 -
723_llvm_r 11.516 -
727_cppcheck_r 24.721 -1.01%
729_abc_r 18.837 -
731_astcenc_r 10.044 -
735_gem5_r 13.575 -
736_ocio_r 16.233 -
737_gmsh_r 12.925 -
748_flightdm_r 8.923 -
750_sealcrypto_r 18.355 -
753_ns3_r 10.049 -1.75%
766_femflow_r 12.814 -
Geometric Mean 14.140 -