[libcxx-commits] [libcxx] [libc++] Assume separate storage in vector (PR #225325)

[Nikolas Klauser via libcxx-commits]

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philnik777 wrote:

```
Benchmark           Baseline    Candidate    Difference    % Difference   Significant?   95% C.I. of %diff
----------------  ----------  -----------  ------------  --------------  --------------  -------------------
706_stockfish_r       122.84       122.73         -0.11          -0.09%                  [-8.3%, +7.1%]
707_ntest_r            99.68        99.56         -0.12          -0.12%                  [-4.5%, +2.8%]
709_cactus_r          135.59       135.45         -0.14          -0.11%                  [-4.5%, +3.9%]
710_omnetpp_r          78.56        78.58          0.02           0.02%                  [-0.7%, +0.9%]
721_gcc_r              91.97        91.95         -0.02          -0.02%                  [-0.6%, +0.5%]
723_llvm_r             97.78        97.66         -0.12          -0.13%                  [-0.6%, +0.5%]
727_cppcheck_r         73.47        73.32         -0.16          -0.21%                  [-1.4%, +1.2%]
729_abc_r              93.10        93.10          0.00           0.00%                  [-0.3%, +0.2%]
731_astcenc_r          83.15        83.15         -0.00          -0.00%                  [-0.2%, +0.1%]
734_vpr_r              79.56        79.55         -0.00          -0.01%                  [-0.2%, +0.1%]
735_gem5_r             78.47        78.59          0.13           0.16%                  [-0.5%, +0.7%]
737_gmsh_r             89.75        89.72         -0.03          -0.03%                  [-0.4%, +0.3%]
748_flightdm_r         91.16        90.99         -0.17          -0.19%                  [-1.7%, +1.7%]
750_sealcrypto_r       79.80        79.81          0.01           0.01%                  [-0.0%, +0.1%]
753_ns3_r              85.14        85.11         -0.03          -0.04%                  [-0.8%, +0.6%]
766_femflow_r         109.20       109.15         -0.05          -0.04%                  [-0.2%, +0.2%]
767_nest_r             90.57        90.80          0.23           0.26%                  [-0.8%, +1.2%]
772_marian_r          117.04       117.05          0.01           0.01%                  [-0.0%, +0.0%]
Geomean                92.95        92.92         -0.03          -0.03%
```
Though I'm not super sure this is representative. It's a single run.


https://github.com/llvm/llvm-project/pull/225325