benchmark: use commas in non-csv rate output
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
- benchmark
Description of change
This just adds commas as separators in the (non-csv) rate output to make it easier to read when dealing with larger numbers.
/cc @nodejs/benchmarking ?