The bench script invoked by cabal bench or stack bench now links the
benchmarked code directly, avoiding any dependence on the shell and
$PATH. Also, it reports the journal parse time and the various reports
on the parsed data separately, and runs quicker.
You can get more accurate benchmark times by running with --criterion.
This will usually give much the same numbers and takes much longer.
Benchmarking via simplebench is still available, by running with
--simplebench. In this mode it benchmarks whatever commands are
configured in bench/default.bench. A disadvantage is that it uses the
first "hledger" executable in $PATH, so check which one it reports.
