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[libcu++] Optimize to_chars integral width calculation #25186

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[libcu++] Optimize to_chars integral width calculation

[libcu++] Optimize to_chars integral width calculation #25186

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Job Run time
Build workflow from matrix
26s
Build documentation
4m 17s
Build MatX (optional) / Build MatX
50m 33s
Verify Dev Containers / Verify devcontainer files are up-to-date
37s
Build RAPIDS (optional) / Check GH Event
4s
Build PyTorch (optional) / Build PyTorch
11m 13s
cudax nvcc MSVC / [CTK13.3 MSVC14.50 C++20] Build(amd64): sm{75}
16m 12s
CCCL C Parallel nvcc MSVC / [CTK13.3 MSVC14.44] Build(amd64): sm{75}
12m 35s
CUB nvcc MSVC / [CTK13.3 MSVC14.50 C++20] BuildNoLaunch(amd64): sm{86}
18m 33s
Bench Compare (${{ matrix.gpu }})
-1s
CUB nvcc MSVC / [CTK13.3 MSVC14.50 C++20] BuildHostLaunch(amd64): sm{86}
22m 23s
CCCL C Parallel v2 (HostJIT) nvcc GCC / [CTK13.3 GCC13] Test(amd64, RTX2080)
29m 17s
CCCL Packaging nvcc Clang / [CTK13.3 Clang21] Test(amd64, RTX2080): sm{75}
2m 35s
NVBench Helper nvcc Clang / [CTK13.3 Clang21] Test(amd64, RTX2080)
12m 1s
CCCL Packaging nvcc GCC / [CTK13.3 GCC15] Test(amd64, RTX2080): sm{75} -min-cmake
2m 49s
CCCL Packaging nvcc GCC / [CTK13.3 GCC15] Install(amd64)
2m 27s
cudax nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] Build(amd64): sm{75;120}
8m 54s
Thrust nvcc Clang / [CTK13.3 Clang21 C++20] Build(amd64): sm{75;120}
15m 32s
CCCL Packaging nvcc GCC / [CTK13.3 GCC15] Test(amd64, RTX2080): sm{75}
2m 37s
libcu++ ClangCUDA / [CTK12.9 Clang21 C++20] Build(amd64): sm{75;80;90;100;120}
29m 10s
Thrust ClangCUDA / [CTK12.9 Clang21 C++20] Build(amd64): sm{75;120}
20m 38s
CUB nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] BuildHostLaunch(amd64)
32m 28s
libcu++ ClangCUDA / [CTK12.9 Clang21 C++23] Build(amd64): sm{75;80;90;100;120}
29m 16s
libcu++ nvcc MSVC / [CTK12.0 MSVC14.39 C++20] Build(amd64)
47m 22s
CUB nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] BuildNoLaunch(amd64)
27m 11s
libcu++ ClangCUDA / [CTK12.9 Clang21 C++17] Build(amd64): sm{75;80;90;100;120}
33m 40s
libcu++ nvcc MSVC / [CTK12.9 MSVC14.29 C++17] Build(amd64)
1h 1m 58s
libcu++ nvcc MSVC / [CTK13.3 MSVC14.44 C++20] Build(amd64)
1h 4m 54s
libcu++ nvcc MSVC / [CTK13.0 MSVC14.29 C++17] Build(amd64)
1h 12m 40s
libcu++ nvcc MSVC / [CTK12.9 MSVC14.44 C++20] Build(amd64)
1h 2m 52s
libcu++ nvcc MSVC / [CTK12.0 MSVC14.29 C++17] Build(amd64)
51m 34s
libcu++ nvcc MSVC / [CTK12.9 MSVC14.44 C++17] Build(amd64)
1h 2m 36s
NVBench Helper nvcc GCC / [CTK13.3 GCC15] Test(amd64, RTX2080)
12m 52s
libcu++ nvcc MSVC / [CTK12.0 MSVC14.39 C++17] Build(amd64)
51m 59s
libcu++ nvcc MSVC / [CTK13.3 MSVC14.50 C++17] Build(amd64)
1h 6m 10s
libcu++ nvcc MSVC / [CTK13.0 MSVC14.44 C++17] Build(amd64)
1h 12m 36s
NVHPC stdpar nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] Build(amd64)
4m 43s
libcu++ nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] Build(amd64)
58m 58s
libcu++ nvcc MSVC / [CTK13.0 MSVC14.44 C++20] Build(amd64)
1h 8m 19s
libcu++ nvcc MSVC / [CTK13.3 MSVC14.50 C++20] Build(amd64)
1h 5m 34s
libcu++ nvcc NVHPC / [CTK13.1 NVHPC26.3 C++17] Build(amd64)
59m 26s
CUB ClangCUDA / [CTK12.9 Clang21 C++20] BuildHostLaunch(amd64): sm{75;80;90;100;120}
23m 10s
Thrust nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] Build(amd64): sm{75;120}
29m 19s
libcu++ nvcc NVHPC / [CTK13.1 NVHPC26.3 C++20] Build(arm64)
50m 13s
cudax nvcc Clang / [CTK13.3 Clang21 C++20] Build(amd64): sm{75;120}
5m 46s
CUB nvcc Clang / [CTK13.3 Clang21 C++20] BuildHostLaunch(amd64)
36m 44s
CUB ClangCUDA / [CTK12.9 Clang21 C++20] BuildNoLaunch(amd64): sm{75;80;90;100;120}
15m 47s
CUB nvcc Clang / [CTK13.3 Clang21 C++20] BuildNoLaunch(amd64)
27m 37s
libcu++ nvcc MSVC / [CTK13.3 MSVC14.29 C++17] Build(amd64)
1h 6m 4s
libcu++ nvcc NVHPC / [CTK13.1 NVHPC26.3 C++17] Build(arm64)
52m 1s
clang-tidy ClangCUDA / [CTK12.9 Clang21 C++17] Build(amd64): sm{75}
59m 42s
libcu++ nvcc GCC / [CTK12.0 GCC12 C++17] Build(amd64)
30m 54s
libcu++ nvcc GCC / [CTK12.0 GCC7 C++17] Build(amd64)
27m 17s
libcu++ nvcc GCC / [CTK12.0 GCC12 C++20] Build(amd64)
28m 52s
libcu++ nvcc GCC / [CTK12.9 GCC14 C++17] Build(amd64)
37m 31s
libcu++ nvcc GCC / [CTK13.3 GCC13 C++20] Build(amd64)
34m 18s
libcu++ nvcc GCC / [CTK12.9 GCC14 C++20] Build(amd64)
37m 16s
libcu++ nvcc GCC / [CTK13.0 GCC15 C++17] Build(amd64)
43m 1s
libcu++ nvcc GCC / [CTK13.0 GCC11 C++17] Build(amd64)
43m 18s
libcu++ nvcc GCC / [CTK13.3 GCC12 C++20] Build(amd64)
33m 52s
libcu++ nvcc GCC / [CTK13.0 GCC15 C++20] Build(amd64)
44m 4s
libcu++ nvcc GCC / [CTK12.9 GCC7 C++17] Build(amd64)
37m 47s
libcu++ nvcc GCC / [CTK13.3 GCC15] VerifyCodegen(amd64)
2m 13s
libcu++ nvcc GCC / [CTK13.3 GCC15 C++20] NVRTC(amd64, RTX2080): sm{75}
31m 46s
libcu++ nvcc GCC / [CTK13.0 GCC11 C++20] Build(amd64)
43m 40s
libcu++ nvcc GCC / [CTK13.3 GCC11 C++17] Build(amd64)
35m 10s
libcu++ nvcc GCC / [CTK13.3 GCC14 C++20] Build(amd64)
33m 39s
libcu++ nvcc GCC / [CTK13.3 GCC15 C++17] NVRTC(amd64, RTX2080): sm{75}
32m 29s
libcu++ nvcc GCC / [CTK13.3 GCC15 C++17] Build(amd64)
34m 27s
Thrust nvcc MSVC / II / [CTK13.3 MSVC14.50 C++20] Build(amd64): sm{89}
30m 17s
libcu++ nvcc GCC / [CTK13.3 GCC11 C++20] Build(amd64)
34m 10s
libcu++ nvcc GCC / [CTK13.3 GCC15 C++20] Build(arm64)
30m 45s
libcu++ nvcc Clang / [CTK12.9 Clang14 C++17] Build(amd64)
36m 25s
libcu++ nvcc Clang / [CTK12.9 Clang19 C++17] Build(amd64)
36m 34s
libcu++ nvcc Clang / [CTK12.0 Clang14 C++17] Build(amd64)
33m 19s
libcu++ nvcc Clang / [CTK12.9 Clang19 C++20] Build(amd64)
34m 51s
libcu++ nvcc Clang / [CTK13.0 Clang20 C++20] Build(amd64)
39m 55s
libcu++ nvcc Clang / [CTK12.9 Clang14 C++20] Build(amd64)
36m 3s
libcu++ nvcc Clang / [CTK13.3 Clang15 C++17] Build(amd64)
33m 47s
libcu++ nvcc Clang / [CTK13.0 Clang20 C++17] Build(amd64)
41m 19s
libcu++ nvcc Clang / [CTK13.0 Clang15 C++17] Build(amd64)
42m 13s
libcu++ nvcc Clang / [CTK13.3 Clang16 C++20] Build(amd64)
32m 56s
libcu++ nvcc Clang / [CTK12.0 Clang14 C++20] Build(amd64)
31m 52s
libcu++ nvcc Clang / [CTK13.3 Clang15 C++20] Build(amd64)
33m 13s
libcu++ nvcc Clang / [CTK13.3 Clang18 C++20] Build(amd64)
32m 43s
libcu++ nvcc Clang / [CTK13.0 Clang15 C++20] Build(amd64)
41m 15s
CUB nvcc GCC / BQ / [CTK13.3 GCC15 C++20] BuildHostLaunch(amd64): sm{86}
13m 4s
libcu++ nvcc Clang / [CTK13.3 Clang20 C++20] Build(amd64)
34m 6s
Post benchmark results
0s
libcu++ nvcc Clang / [CTK13.3 Clang19 C++20] Build(amd64)
31m 39s
libcu++ nvcc Clang / [CTK13.3 Clang17 C++20] Build(amd64)
32m 54s
Python (cuda.compute on v2/HostJIT) nvcc GCC / Gw / [CTK12.9 GCC13 py3.14] Build cuda.cccl(amd64)
31m 43s
libcu++ nvcc Clang / [CTK13.3 Clang21 C++20] Build(arm64)
30m 16s
Python nvcc MSVC / HY / [CTK12.9 MSVC14.44 py3.14] Build cuda.cccl(amd64)
26m 31s
Python nvcc GCC / HA / [CTK12.9 GCC13 py3.14] Build cuda.cccl(amd64)
9m 26s
cudax nvcc GCC / B8 / [CTK13.3 GCC15 C++20] Build(amd64): sm{75}
5m 46s
libcu++ nvcc Clang / [CTK13.3 Clang21 C++17] Build(amd64)
35m 26s
CUB nvcc GCC / Bc / [CTK13.3 GCC15 C++20] BuildNoLaunch(amd64): sm{86}
12m 27s
libcu++ nvcc GCC / FU / [CTK13.3 GCC15 C++20] Build(amd64): sm{90}
14m 16s
libcu++ nvcc Clang / Do / [CTK13.3 Clang21 C++20] Build(amd64)
34m 38s
CCCL C CUDASTF nvcc GCC / A / [CTK13.3 GCC13] Build(amd64): sm{75}
2m 15s
CCCL C Parallel nvcc GCC / M / [CTK13.3 GCC13] Build(amd64): sm{75}
2m 17s
CCCL C Parallel nvcc GCC / Y / [CTK13.3 GCC13] Build(amd64): sm{120}
2m 20s
libcu++ nvcc GCC / FE / [CTK13.3 GCC15 C++20] Build(amd64)
33m 23s
Thrust nvcc GCC / H4 / [CTK13.3 GCC15 C++20] Build(amd64): sm{89}
13m 15s
Build RAPIDS (optional) / rmm ucxx raft cuvs nvforest cuml cuopt
1h 12m 34s
Build RAPIDS (optional) / rmm ucxx raft cuvs cugraph wholegraph
1h 18m 45s
Build RAPIDS (optional) / rmm ucxx kvikio cudf cudf_kafka
35m 15s
Verify Dev Containers / matrix.devcontainer.name
-1s
CCCL C CUDASTF nvcc GCC / A / [CTK13.3 GCC13] Test(amd64, RTX2080): sm{75}
2m 20s
CCCL C Parallel nvcc GCC / M / [CTK13.3 GCC13] Test(amd64, RTX2080): sm{75}
12m 24s
CCCL C Parallel nvcc GCC / Y / [CTK13.3 GCC13] Test(amd64, RTXPRO6000): sm{120}
11m 29s
cudax nvcc GCC / B8 / [CTK13.3 GCC15 C++20] Test(amd64, RTX2080): sm{75}
6m 43s
Python nvcc GCC / HA / [CTK13.3 GCC13 py3.14] Test cuda.coop._experimental(amd64, L4)
5m 40s
Python nvcc GCC / HA / [CTK13.3 GCC13 py3.14] Test cuda.cccl.examples(amd64, L4)
3m 28s
Python nvcc GCC / HA / [CTK13.3 GCC13 py3.14] Test cuda.compute(amd64, L4)
17m 59s
Python nvcc GCC / HA / [CTK13.3 GCC13 py3.14] Test cuda.cccl.headers(amd64, L4)
2m 26s
Build PyTorch (optional) / Notify Slack of PyTorch failure
0s
CUB nvcc GCC / Bc / [CTK13.3 GCC15 C++20] TestNoLaunch(amd64, RTXA6000): sm{86}
4m 50s
CUB nvcc GCC / BQ / [CTK13.3 GCC15 C++20] HostLaunch(amd64, RTXA6000): sm{86}
25m 6s
Thrust nvcc GCC / H4 / [CTK13.3 GCC15 C++20] TestCPU(amd64): sm{89}
4m 13s
Thrust nvcc GCC / H4 / [CTK13.3 GCC15 C++20] TestGPU(amd64, RTX4090): sm{89}
3m 44s
libcu++ nvcc GCC / FU / [CTK13.3 GCC15 C++20] Test(amd64, H100 2-GPU): sm{90}
44m 8s
Python nvcc MSVC / HY / [CTK13.3 MSVC14.44 py3.14] Test cuda.cccl.examples(amd64, L4)
22m 33s
Python nvcc MSVC / HY / [CTK13.3 MSVC14.44 py3.14] Test cuda.cccl.headers(amd64, L4)
19m 15s
Python nvcc MSVC / HY / [CTK13.3 MSVC14.44 py3.14] Test cuda.coop._experimental(amd64, L4)
25m 54s
Python nvcc MSVC / HY / [CTK13.3 MSVC14.44 py3.14] Test cuda.compute(amd64, L4)
52m 54s
Thrust nvcc MSVC / II / [CTK13.3 MSVC14.50 C++20] TestCPU(amd64): sm{89}
16m 17s
Python (cuda.compute on v2/HostJIT) nvcc GCC / Gw / [CTK13.3 GCC13 py3.14] Test cuda.compute(amd64, L4)
29m 55s
Python (cuda.compute on v2/HostJIT) nvcc GCC / Gw / [CTK13.3 GCC13 py3.14] Test cuda.cccl.examples(amd64, L4)
5m 18s
libcu++ nvcc GCC / FE / [CTK13.3 GCC15 C++20] Test(amd64, H100)
28m 50s
libcu++ nvcc GCC / FE / [CTK13.3 GCC15 C++20] Test(amd64, RTX2080)
25m 7s
libcu++ nvcc Clang / Do / [CTK13.3 Clang21 C++20] Test(amd64, RTX2080)
27m 53s
Build MatX (optional) / Notify Slack of MatX failure
0s
Test CPU-only import
23s
Build RAPIDS (optional) / Notify Slack of RAPIDS failure
0s
Verify and summarize workflow results
49s
CI
4s
2d 15h 21m 31s