I benchmark it again on linux, where find is of 4.7.0 version and fd is of 8.2.1 version.

Make sure the page cache is cleared before each benchmark.

> sudo sysctl -w vm.drop_caches=3

> cd llvm-project

> sudo sysctl -w vm.drop_caches=3

> time fd > /tmp/fd_output

1.04s user 4.11s system 522% cpu 0.987 total

> sudo sysctl -w vm.drop_caches=3

> time find > /tmp/find_output

0.06s user 0.20s system 7% cpu 3.354 total

Since ‘fd’ is a multi-threaded program, the CPU percent is > 100%.