I've also found the 1.5 GHz in-order VF2 does remarkably well vs the 1.85 GHz OoO LPi4A on software build tasks, though not as extreme as Richard shows. I'm la

I've also found the 1.5 GHz in-order VF2 does remarkably well vs the 1.85 GHz OoO LPi4A on software build tasks, though not as extreme as Richard shows. I'm lazy and using the original Image-55 on my 8 GB VF2, and the Debian that came preloaded in the eMMC on the LPi4A. My mass-production LPi4A arrived yesterday, I haven't tried it yet, tests are on the beta board that arrived a couple of months ago. On pure CPU core + L1 cache tests (e.g. https://hoult.org/primes.txt https://hoult.org/primes.txt) the LPi4A is considerably faster. The LPi4A is also much faster on memcpy tests. https://hoult.org/TH1520_memcpy.txt https://hoult.org/TH1520_memcpy.txt https://hoult.org/JH7110_memcpy.txt https://hoult.org/JH7110_memcpy.txt My build test is an RVV 0.7.1-enabled snapshot of the gnu toolchain (gcc 9.2) that I use on the TH1520 and SG2042 (and various chips with C906 cores with RVV 0.7.1). Newlib, non-multilib (just rv64gcv) build. I used the same Samsung 2 TB external USB3 SSD drive for src/build trees on both boards. https://github.com/brucehoult/riscv-gnu-toolchain https://github.com/brucehoult/riscv-gnu-toolchain VF2: real 107m52.116s user 348m49.800s sys 16m27.529s LPi4A: real 122m16.099s user 400m17.737s sys 23m8.567s Neither board is thermal throttling at all. I have the supplied fan sitting loosely on top of the LPi4A CPU (I also try tests without the fan ... it throttles a lot, taking 166m on this test). The VF2 is without a fan -- doesn't need it. The LPi4A has more L1 cache, but only 1 MB of L2 vs 2 MB on the VF2. But the LPi4A's RAM is twice as fast as the VF2's L2 cache! At least for streaming -- I haven't tried random. It's a mystery.