From @pmichaud

Refined from a case given by harmil++ on #perl6, the optimizer seems
to have problems with long expressions.

  pmichaud@​kiwi​:~/p6/rakudo$ cat z
  #!/bin/bash
  for size in 1 10 100 500 1000 10000;
  do
  code=$(./perl6 -e "say (1..$size).join('+')")
  time --format="Expression in input $size​: %e" -- ./perl6 --stagestats --ll-exception -e "my \$x = $code;" || break;
  echo
  done
 
  pmichaud@​kiwi​:~/p6/rakudo$ sh z
  Stage parse​: 0.341
  Stage syntaxcheck​: 0.000
  Stage past​: 0.000
  Stage optimize​: 0.001
  Stage post​: 0.005
  Stage pir​: 0.002
  Stage evalpmc​: 0.002
  Expression in input 1​: 0.44
 
  Stage parse​: 0.415
  Stage syntaxcheck​: 0.000
  Stage past​: 0.000
  Stage optimize​: 0.013
  Stage post​: 0.007
  Stage pir​: 0.002
  Stage evalpmc​: 0.002
  Expression in input 10​: 0.53
 
  Stage parse​: 0.582
  Stage syntaxcheck​: 0.000
  Stage past​: 0.000
  Stage optimize​: 0.203
  Stage post​: 0.022
  Stage pir​: 0.006
  Stage evalpmc​: 0.003
  Expression in input 100​: 0.91
 
  Stage parse​: 1.392
  Stage syntaxcheck​: 0.000
  Stage past​: 0.000
  Stage optimize​: 0.525
  Stage post​: 0.094
  Stage pir​: 0.069
  Stage evalpmc​: 0.003
  Expression in input 500​: 2.19
 
  Stage parse​: 2.367
  Stage syntaxcheck​: 0.000
  Stage past​: 0.000
  Stage optimize​: 1.208
  Stage post​: 0.190
  Stage pir​: 0.316
  Stage evalpmc​: 0.005
  Expression in input 1000​: 4.19
 
  Stage parse​: 20.673
  Stage syntaxcheck​: 0.000
  Stage past​: 0.000
  Stage optimize​: 69.954
  Stage post​: 2.818
  Stage pir​: 88.863
  Stage evalpmc​: 0.046
  Expression in input 10000​: 182.50
 
  pmichaud@​kiwi​:~/p6/rakudo$
 
Pm

From @coke

On Tue Jun 19 11​:51​:14 2012, pmichaud wrote​:

Refined from a case given by harmil++ on #perl6, the optimizer seems
to have problems with long expressions.

pmichaud@​kiwi​:~/p6/rakudo$ cat z
#!/bin/bash
for size in 1 10 100 500 1000 10000;
do
code=$(./perl6 -e "say (1..$size).join('+')")
time --format="Expression in input $size​: %e" -- ./perl6
--stagestats --ll-exception -e "my \$x = $code;" || break;
echo
done

pmichaud@​kiwi​:~/p6/rakudo$ sh z
Stage parse​: 0.341
Stage syntaxcheck​: 0.000
Stage past​: 0.000
Stage optimize​: 0.001
Stage post​: 0.005
Stage pir​: 0.002
Stage evalpmc​: 0.002
Expression in input 1​: 0.44

Stage parse​: 0.415
Stage syntaxcheck​: 0.000
Stage past​: 0.000
Stage optimize​: 0.013
Stage post​: 0.007
Stage pir​: 0.002
Stage evalpmc​: 0.002
Expression in input 10​: 0.53

Stage parse​: 0.582
Stage syntaxcheck​: 0.000
Stage past​: 0.000
Stage optimize​: 0.203
Stage post​: 0.022
Stage pir​: 0.006
Stage evalpmc​: 0.003
Expression in input 100​: 0.91

Stage parse​: 1.392
Stage syntaxcheck​: 0.000
Stage past​: 0.000
Stage optimize​: 0.525
Stage post​: 0.094
Stage pir​: 0.069
Stage evalpmc​: 0.003
Expression in input 500​: 2.19

Stage parse​: 2.367
Stage syntaxcheck​: 0.000
Stage past​: 0.000
Stage optimize​: 1.208
Stage post​: 0.190
Stage pir​: 0.316
Stage evalpmc​: 0.005
Expression in input 1000​: 4.19

Stage parse​: 20.673
Stage syntaxcheck​: 0.000
Stage past​: 0.000
Stage optimize​: 69.954
Stage post​: 2.818
Stage pir​: 88.863
Stage evalpmc​: 0.046
Expression in input 10000​: 182.50

pmichaud@​kiwi​:~/p6/rakudo$

Pm

Current timings seem much better on MoarVM - can we close this ticket?

--
Will "Coke" Coleda

The RT System itself - Status changed from 'new' to 'open'

@moritz - Status changed from 'open' to 'resolved'