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Benchmarks

Performance measurements on 512x512 gradient test images using criterion.

Environment: Apple M-series, macOS, Rust release profile with thin LTO. Results will vary by hardware. Run cargo bench -p slimg-core to measure on your machine.

Codec Performance

Encode (512x512, quality 80)

Format Time Throughput
QOI 352 µs 744 Mpx/s
JPEG 7.2 ms 36 Mpx/s
WebP 9.3 ms 28 Mpx/s
AVIF 29 ms 9 Mpx/s
PNG 45 ms 5.8 Mpx/s

Decode

Format Time Throughput
QOI 254 µs 980 MiB/s
JPEG 380 µs 12.7 MiB/s
PNG 676 µs 2.8 MiB/s
AVIF 945 µs 3.4 MiB/s
WebP 2.1 ms 1.2 MiB/s

Pipeline Performance

Format Conversion

Pipeline Time Throughput
PNG → JPEG 7.8 ms 33.5 Mpx/s
JPEG → WebP 8.3 ms 31.6 Mpx/s
PNG → AVIF 28.6 ms 9.2 Mpx/s
WebP → PNG 203 ms 1.3 Mpx/s

Optimize (re-encode same format)

Format Time
WebP 7.2 ms
JPEG 8.4 ms
AVIF 26 ms
PNG 44 ms

Resize (512x512 → 256x256)

Mode Time Throughput
Width 2.09 ms 125 Mpx/s
Height 2.09 ms 125 Mpx/s
Exact 2.09 ms 125 Mpx/s
Scale (0.5x) 2.08 ms 126 Mpx/s
Fit 2.09 ms 125 Mpx/s

Running Benchmarks

# Run all benchmarks
cargo bench -p slimg-core

# Run specific group
cargo bench -p slimg-core -- encode
cargo bench -p slimg-core -- decode
cargo bench -p slimg-core -- convert
cargo bench -p slimg-core -- optimize
cargo bench -p slimg-core -- resize

HTML reports are generated at target/criterion/report/index.html.