Bug 474174

Summary:	Please add multithread / multicore extraction and compression
Product:	[Applications] ark	Reporter:	etfaker
Component:	general	Assignee:	Elvis Angelaccio <elvis.angelaccio>
Status:	REOPENED ---
Severity:	wishlist	CC:	aacid, bugseforuns, integral, nate, rthomsen6, sam
Priority:	NOR
Version:	23.08.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:	https://invent.kde.org/utilities/ark/-/commit/e0928747e26415a1b46e753c517fb83b4b24c62c	Version Fixed In:	24.02
Sentry Crash Report:

Description etfaker 2023-09-05 06:24:50 UTC

SUMMARY
***
Please add multithread / multicore extraction and compression.
On modern systems, especially with fast 7.000MB/s NVME's, the extraction and compression could be a lot faster.
Comparing speeds with Windows (e.g. 7-zip) gives me sometimes 4-5 times of a quicker extraction than with Ark on Linux.
I can also monitor the system load when extracting and it doesn't do any real load to CPU/NVME.
***


STEPS TO REPRODUCE
Extract / Compress anything

OBSERVED RESULT
Slow speed

EXPECTED RESULT
Faster speed

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: x86_64 Linux 6.4.12-arch1-1
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.109.0-1
Qt Version:  	5.15.10

ADDITIONAL INFORMATION
Thinkpad T14s G3 AMD (Ryzen 7 6850U, 32GB RAM, Solidigm P44 Pro NVME)

Comment 1 etfaker 2023-09-27 12:17:56 UTC

I don't want to be ignorant but why doesn't this get more attention? Am I missing smth?

Comment 2 Patrick Silva 2023-09-27 17:08:53 UTC

*** Bug 474805 has been marked as a duplicate of this bug. ***

Comment 3 Bug Janitor Service 2023-10-18 05:52:15 UTC

A possibly relevant merge request was started @ https://invent.kde.org/utilities/ark/-/merge_requests/207

Comment 4 Elvis Angelaccio 2023-11-05 11:58:27 UTC

Git commit e0928747e26415a1b46e753c517fb83b4b24c62c by Elvis Angelaccio, on behalf of Zhangzhi Hu.
Committed on 05/11/2023 at 12:58.
Pushed by elvisangelaccio into branch 'master'.

Add support for xz & zstd multithread compression

xz & zstd compression was single-threaded; make it multi-threaded,
with an algorithm to calculate the ideal number of threads based
on the number of CPU cores.
FIXED-IN: 24.02

M  +18   -0    plugins/libarchive/readwritelibarchiveplugin.cpp

https://invent.kde.org/utilities/ark/-/commit/e0928747e26415a1b46e753c517fb83b4b24c62c

Comment 5 etfaker 2023-11-05 12:03:59 UTC

Multithread fornxz and zstd was added but the majority of ppl work with zip,7z and rar which still doesn't have multithread and makes using Ark a lot.slower compared to other tools.