[Solved] BUG: Low data throughput (bug in Opnsense or FreeBSD?)

[pfry]

[...] Both Opnsense and PFsense had the same data throughput issue, while FreeBSD and Linux did not. [...]

powerd?

[schnipp]

No, powerd wasn't the problem. I tried many configurations without success. In retrospect, it looks to me like a timing issue in the FreeBSD kernel, which is probably causing problems with the default ACPI configuration of the UEFI firmware.