SPNGT

SPNGT is a test suite and benchmarking utility for libspng, libpng, stb_image and lodepng.

Benchmark results are at available at https://libspng.org.

Dependencies

Git LFS for cloning benchmark images
meson
zlib
lodepng and stb_image are included in the project

The following are automatically downloaded as meson subprojects:

benchmark images
libspng
libpng (depending on configuration)

Switch between building libpng from source and the system-provided libpng with meson -Dlibpng_variant=download/system.

Creating a build

meson --buildtype=release build
cd build

Running the benchmark

ninja
ninja benchmark
cat meson-logs/benchmarklog.txt

Compile with Profile-guided optimization (PGO)

meson build
cd build
meson configure --buildtype=release -Db_pgo=generate
ninja benchmark
meson configure -Db_pgo=use
ninja benchmark
cat meson-logs/benchmarklog.txt

Cross-build for Android / ARM

Compiling for Android requires the NDK.

Edit the path for the binaries in cross_arm.txt, these must be absolute paths.

Specify the the cross file when creating the cross build