Mailing the story:
Raspberry Pi OS 32-bit vs. 64-bit Performance
Last week marked the long awaited release of a 64-bit spin of Raspberry Pi OS. The Raspberry Pi Foundation has now made available a 64-bit build of their default Linux OS build derived from Debian for all recent Raspberry Pi hardware supporting AArch64. For those curious, here are some benchmarks looking at the performance improvement by switching from Raspberry Pi OS 32-bit to 64-bit.