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Date: Fri, 26 Jan 2024 20:52:35 +0100
Message-ID: <CAJmy8YFCdConnJBujHV2rRnirCn60u6FnLKqLEbn1zVvsi9oDA@mail.gmail.com>
To: Marco Pivetta <ocramius@gmail.com>
Cc: tag Knife <fenniclog@gmail.com>, Hans Henrik Bergan <hans@loltek.net>, 
	PHP Internals List <internals@lists.php.net>
Content-Type: text/plain; charset="UTF-8"
Subject: Re: [PHP-DEV] BLAKE3 hash
From: divinity76@gmail.com (Hans Henrik Bergan)

just tested ARM Neon optimizations on Oracle Cloud's cheapest ARM VPS:
VM.Standard.A1.Flex, Ubuntu 22.04, GCC11.4,
results:
-O2 portable: 596MB/s
-O2 -march=native portable: 601MB/s
-O2 ARM Neon optimized implementation: 1138MB/s

Again, even with -march=native, the compiler cannot make the portable
implementation nearly as fast as the hand-optimized cpu-specific
implementation.