| 17 May 2025 |
 dramforever | it also just does not have vector instructions | 17:09:00 |
 @lotte:chir.rs | lemme try openssl speed | 17:09:02 |
| dramforever | so base64 checks out depending on implementation | 17:09:15 |
| @lotte:chir.rs | the rust base64 raccrate | 17:09:23 |
| dramforever | i have no idea what this compiles down to | 17:14:29 |
| dramforever | but anyway don't expect to be able to replicate the speed ration on random benchmarks | 17:15:29 |
| dramforever | * but anyway don't expect to be able to replicate the speed ratio on random benchmarks | 17:15:40 |
| dramforever | not happening | 17:16:16 |
| dramforever | as of uuid generation i wonder if it's going through vdso on arm and a syscall on riscv | 17:17:57 |
| @lotte:chir.rs |
Doing 4096 bits private rsa sign ops for 10s: 142 4096 bits private RSA sign ops in 9.93s
| 17:22:52 |
| @lotte:chir.rs | so fast | 17:22:53 |
| dramforever | yeah not having vector instructions really helps | 17:23:48 |
| @lotte:chir.rs | results are in ✨ | 17:30:16 |
| @lotte:chir.rs | https://docs.google.com/spreadsheets/d/1xvuzBbQaWIGIrmKiYEHSkABQkhmKc8WNKTZWFyVgvqA/edit?usp=sharing | 17:30:17 |
| @lotte:chir.rs | in general it seems that the single raccore performance of the vf2 is about half that of the cm4 | 17:30:45 |
| @lotte:chir.rs | presumably both have working hardware aes, but the sha256 implementation seems to be 3x slower than on the cm4 | 17:31:40 |
 Alex | Assuming the system is properly configured to use the hardware crypto (on either system). | 17:32:24 |
| @lotte:chir.rs | default settings | 17:33:03 |
| @lotte:chir.rs | the cm4 is running kde wayland and yes it is not that fast ™️ | 17:33:33 |
| dramforever | In reply to @lotte:chir.rs
presumably both have working hardware aes, but the sha256 implementation seems to be 3x slower than on the cm4 NOPE | 17:42:31 |
| dramforever | no hardware AES on vf2 | 17:42:36 |
| @lotte:chir.rs | how the hell is the cm4 slower then | 17:42:55 |
| dramforever | i alsp doubt the crypto engine on vf2 is even supposed to be fast | 17:43:00 |
| dramforever | magic | 17:43:17 |
| dramforever | In reply to @dramforever:matrix.org
no hardware AES on vf2 okay tbc i mean aes instructions | 17:44:21 |
| dramforever | maybe they are using the crypto engine on vf2 and i was mistaken about its speed? | 17:46:00 |
| @lotte:chir.rs | i’m still sad about the B extension in riscv because it had some Very Interesting instructions | 17:46:33 |
| dramforever | zba_zbb is really nice | 17:47:06 |
| dramforever | i expect those to close up the difference with arm on basic operations | 17:48:01 |
| @lotte:chir.rs | zba is useful for indexing, zbb are instructions that really should have just been part of the base abi | 17:48:03 |
