TurboJPEG rocks !

Units to support the TurboJPEG library is now available in the DWScript repository, you can find the relevant files in the Libraries\GraphicsLib folder, they have been tested with Delphi 10.3 in both Win32 and Win64. The DLLs are those of the latest 2.05 version.

The TurboJPEG library (aka “libjpeg-turbo”) provides a fast implementation of the libjpeg API, but the files here target the TurboJPEG core, rather than the libjpeg compatibility layer (see its documention).
The TurboJPEG API is less rich, but quite simple to use and very convenient.


Matrix-Vector multiplication JIT compiler

Committed to daNeuralNet a first working version of a JIT for matrix-vector multiplication that relies on the FMA instruction set (Fused Multiply and Addition).

This version generates code that is up to twice faster than the OpenBLAS for matrix sizes up to CPU cache size (100×100 to 200×200 usually), and maintains a marginal lead for larger sizes, though those are bound by memory bandwidth. The performance profile is similar on both AMD and Intel CPUs.


SamplingProfiler 64 – test version

A test version of SamplingProfiler 64bit is available here (3.2 MB).

It has only been tested with 64bit binaries compiled by Delphi 10.3 and detailed map files. It should work with other Delphi version, (TD32 and other debug information formats have not been tested yet).

There other known issues with stack traces from DLLs, so it is rough around the edges but should be functional.

Dabbling in Neural Nets (again)

I recently dusted off an artificial neural network project, now published at https://bitbucket.org/egrange/daneuralnet/. This is a subject I’ve been dabbling on and off since the days of 8 bit CPUs.

The goals of the project are twofold: first experiment with neural networks that would be practical to run and train on current CPUs, and second experiment with JIT compilation of neural networks maths with Delphi.

TensorFlow and Python are cool, but they feel a bit too much like Minecraft, another sandbox of ready-made blocks 😉