One security issue I somehow missed back in July was Zenbleed, an issue with AMD CPUs that's getting patched up in the Linux kernel and now the Steam Deck is getting a kernel fix for it too.
Which is clearly not correct. Take a look at eg. this benchmark; many workloads take a sizeable hit. Even plain 'ol glibc sin and cos take about 8% longer, and the most pathological hit was the MariaDB workload which took almost 200% longer. Looks like many tasks related to math or heavy-duty string processing will be at least 10-20% slower, but it’s hard to say yet what this’ll do to games. I’d expect CPU-heavy games to be affected
I want to see benchmarks on how this affects actual gameplay. That’ll be the real story.
From what I’ve seen the authors of the papers have listed the zenbleed mitigation impact as “statistically insignificant”.
Which was in stark contrast to Intel’s “up to 50%” performance hit for the Downfall fix.
Which is clearly not correct. Take a look at eg. this benchmark; many workloads take a sizeable hit. Even plain 'ol glibc
sinandcostake about 8% longer, and the most pathological hit was the MariaDB workload which took almost 200% longer. Looks like many tasks related to math or heavy-duty string processing will be at least 10-20% slower, but it’s hard to say yet what this’ll do to games. I’d expect CPU-heavy games to be affected.