u32 firstLeadingBit

Eight independent u32 lanes, unrolled 4x, each stepping x = firstLeadingBit(x) ^ k. Counted as 1 op per lane step (the leading-bit scan; the XOR not counted).

Measured in OP/s. Higher values mean better performance. Benchmark your device.

Performance distribution

42.9 MOP/s11.5 GOP/s3.07 TOP/s

Performance thresholds

99% of results achieve at least 173 MOP/s

95% of results achieve at least 1.98 GOP/s

90% of results achieve at least 8.21 GOP/s

Median (50th percentile) 179 GOP/s

Best performer

Highest recorded performance: 3.07 TOP/s. View benchmark profile.

Recorded 10/29/2026, 12:56:56 AM

WebGPU device

Vendor—

Device—

Architecture—

Description—

WebGL device

VendorGoogle Inc. (NVIDIA)

RendererANGLE (NVIDIA, NVIDIA GeForce 8800 GTX Direct3D11 vs_5_0 ps_5_0), or similar

Browser

NameFirefox

Version159.0

Operating system

NameWindows

Version10