[PATCH 0/4] bench: add support for Google Benchmark

[Akim Demaille]

We need good benchmarking, and Perl's timethese is probably too
coarse.  But it's also the only solution we have so far that is
cross-languages.

As an example, related to whether we should sit pull parsers on top of
pull parsers (with plenty of warnings removed):

./_build/g9d/etc/bench.pl -k -g calc [ %d api.push-pull=both ]
  0. %define api.push-pull both
  1. 
2020-03-21 18:21:17
Run on (8 X 2900 MHz CPU s)
CPU Caches:
  L1 Data 32K (x4)
  L1 Instruction 32K (x4)
  L2 Unified 262K (x4)
  L3 Unified 8388K (x1)
--------------------------------------------------
Benchmark           Time           CPU Iterations
--------------------------------------------------
BM_yy0          31833 ns      31821 ns      21636
BM_yy1          31054 ns      31025 ns      21684

It should also be helpful to Valentin to compare glr.c to glr.cc for
instance.

Akim Demaille (4):
  bench: die clearly on incorrect --grammar arguments
  bench: simplify the calc grammar
  bench: better error messages on invalid input
  bench: calc: add support for google benchmark

 etc/bench.pl.in | 200 +++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 156 insertions(+), 44 deletions(-)

-- 
2.25.1