Recently I did a round of benchmark on the performance and memory implications for an install of Ibexa Experience. You can find this article with some analysis of results here: Benchmarks of Composer 2.0 vs 1.10 with Ibexa DXP
Björn Köster was interested in if I had did any tests for eZ Platform EE 2.5. I had not, but have now. Similar to with Ibexa DXP, the improvements are significant on 2.0. Scripts used for this (single) benchmark are in other files. See raw results below.
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Composer 1.10:
Thu Nov 19 09:38:52 EET 2020
Darwin kampela.local 19.6.0 Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64 x86_64
PHP 7.4.12 (cli) (built: Oct 29 2020 18:37:21) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.12, Copyright (c), by Zend Technologies
Composer version 1.10.7 2020-06-03 10:03:56
composer install v2.5.15 empty caches, no composer.lock: 289
composer req novactive/ezseobundle, full caches: 55
composer install v2.5.15 empty caches, with composer.lock: 197
composer install v2.5.15 full caches, with composer.lock: 16
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Composer 2.0:
Thu Nov 19 09:29:57 EET 2020
Darwin kampela.local 19.6.0 Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64 x86_64
PHP 7.4.12 (cli) (built: Oct 29 2020 18:37:21) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.12, Copyright (c), by Zend Technologies
Composer version 2.0.7 2020-11-13 17:31:06
composer install v2.5.15 empty caches, no composer.lock: 198
composer req novactive/ezseobundle, full caches: 9
composer install v2.5.15 empty caches, with composer.lock: 184
composer install v2.5.15 full caches, with composer.lock: 10
thank you!