linux-kernel - 8x Cache Speedup 18dB Filter, 6dB Phase, for Good Constant-Q

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <334a5f68-c2f4-4144-acbc-5e366169a635@bit-teism.eu>
Date: Tue, 18 Nov 2025 18:45:20 +0100
From: Ywe Cærlyn <bishop@...-teism.eu>
To: linux-kernel@...r.kernel.org
Subject: 8x Cache Speedup 18dB Filter, 6dB Phase, for Good Constant-Q

Been a while since I did this, but should this not be true:

Pseudoish Example of Code,
256k Cache tuned for Multiply-Add
CPU doubling as DSP processor

(Fair Pay Compliant)

Cærlyn "Medium (9db) Phase Filter, 18dB Slope" (Optimal and Open for Synth)

Cut1 = Cutoff;
Cut2 = Cut1 / 1.3;
Cut3 = Cut2 / 1.3;

buf1 = buf1 + ((-buf1 + in) * cut1);
buf2 = buf2 + ((-buf2 + in) * cut2);
buf3 = buf3 + ((-buf3 + in) * cut3);

Out = buf1 + buf2 + buf3; // Parallel alignment of impulse response.

A music app would have very many of these running, resulting in 8x 
speedup, with proper cache handling!

Light.