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    Module benchmarks/nvidia-geforce-gtx-1650/sdot

    Benchmark results for sdot on Nvidia Geforce Gtx 1650.

    n wgblas ms wgblas GB/s cuBLAS ms cuBLAS GB/s efficiency
    32 0.0188 0.0136 0.0104 0.0247 55.0%
    64 0.0192 0.0266 0.0171 0.0299 89.0%
    128 0.0187 0.0547 0.0106 0.0970 56.4%
    512 0.0190 0.2157 0.0105 0.3908 55.2%
    1024 0.0189 0.4328 0.0101 0.8127 53.3%
    4096 0.0189 1.7312 0.0179 1.8286 94.7%
    16384 0.0195 6.7258 0.0175 7.4881 89.8%
    65536 0.0204 25.7206 0.0177 29.5740 87.0%
    262144 0.0325 64.4405 0.0268 78.2052 82.4%
    1048576 0.0668 125.6683 0.0610 137.6084 91.3%
    4194304 0.2044 164.1735 0.1967 170.5834 96.2%
    16777216 0.7504 178.8501 0.7329 183.1374 97.7%

    Efficiency = wgblas GB/s ÷ cuBLAS GB/s × 100. 100% means parity with cuBLAS; values above 100% mean wgblas achieved greater throughput.

    sdot-default GB/s chart

    sdot-default ms chart

    • sdot.js — WebGPU benchmark script
    • sdot.c — CUDA / cuBLAS reference script

    Unless noted otherwise, every result above uses unit stride (incx = incy = 1) — the normal case, and the coalesced, best-case GPU access pattern. Real usage sometimes passes a non-unit stride (e.g. operating on a row or column of a larger matrix, where incx = lda), which breaks memory coalescing and costs measurably more. This section sweeps a few representative strides to characterize that cost separately, collapsed below by default — expand a stride to see its table and chart.

    Nvidia Geforce Gtx 1650 — stride = 4
    n wgblas ms wgblas GB/s cuBLAS ms cuBLAS GB/s efficiency
    32 0.0190 0.0135 0.0102 0.0250 54.0%
    64 0.0192 0.0267 0.0106 0.0484 55.2%
    128 0.0188 0.0545 0.0172 0.0597 91.3%
    512 0.0187 0.2188 0.0175 0.2340 93.5%
    1024 0.0189 0.4339 0.0178 0.4608 94.2%
    4096 0.0192 1.7081 0.0175 1.8686 91.4%
    16384 0.0208 6.3161 0.0181 7.2367 87.3%
    65536 0.0328 16.0078 0.0303 17.3284 92.4%
    262144 0.0676 31.0303 0.0631 33.2501 93.3%
    1048576 0.2069 40.5513 0.1948 43.0521 94.2%
    4194304 0.7671 43.7417 0.7293 46.0114 95.1%

    sdot-stride4 GB/s chart

    sdot-stride4 ms chart

    Nvidia Geforce Gtx 1650 — stride = 32
    n wgblas ms wgblas GB/s cuBLAS ms cuBLAS GB/s efficiency
    32 0.0188 0.0137 0.0104 0.0247 55.3%
    64 0.0186 0.0275 0.0102 0.0500 55.1%
    128 0.0188 0.0545 0.0174 0.0589 92.5%
    512 0.0188 0.2175 0.0175 0.2338 93.0%
    1024 0.0190 0.4317 0.0140 0.5831 74.0%
    4096 0.0228 1.4372 0.0181 1.8092 79.4%
    16384 0.0328 4.0000 0.0292 4.4814 89.3%
    65536 0.0661 7.9284 0.0592 8.8538 89.5%
    262144 0.2084 10.0631 0.1947 10.7701 93.4%
    1048576 0.9317 9.0031 0.7318 11.4631 78.5%

    sdot-stride32 GB/s chart

    sdot-stride32 ms chart

    Nvidia Geforce Gtx 1650 — stride = 256
    n wgblas ms wgblas GB/s cuBLAS ms cuBLAS GB/s efficiency
    512 0.0276 0.1482 0.0178 0.2306 64.3%
    1024 0.0283 0.2891 0.0177 0.4621 62.6%
    4096 0.0323 1.0139 0.0182 1.8028 56.2%
    16384 0.0472 2.7760 0.0313 4.1839 66.3%
    65536 0.0983 5.3316 0.0854 6.1375 86.9%

    sdot-stride256 GB/s chart

    sdot-stride256 ms chart

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