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[hotaru]

out-of-order ARM chips (A72, A75, A76, etc) were hit about the same as AMD. in-order ones (A53, A55, etc) aren't affected, but are obviously much slower....

[hotaru]

still no tests with all mitigations enabled (rather than just the default ones)?

[hotaru]

I just did a quick test with one of the files I use for compression benchmarks. I'm using 64 threads and the uncompressed file is 1.7GB.

...

[hotaru]

xz (the implementation, not the format) doesn't support parallel decompression. also, parallel xz compression causes problems for reproducible builds...

[hotaru]

1. while decompression and copying have to write the same amount of data to memory, decompression doesn't have to read as much.
2. this is comparing...

[hotaru]

1. those benchmarks use a lot fewer cores.

2. in my benchmarks, lz4 and bz2 were both limited by the speed of reading the compressed file...

[hotaru]

bz2 can actually be significantly faster than zstd if you use multithreaded decompression. the last time I ran benchmarks, multithreaded bz2 decompression...

[hotaru]

not to mention the continuous higher CPU load the entire time the page is open because of animated ads, and ads frequently covering up content on mob...

[hotaru]

there's your problem right there. Dell knows that anyone who chooses an i9 cares more about showing off how much money they wasted than about actually...