use warnings;
use strict;
use vars qw($foo $bar $baz $ballast);
-use Test::More tests => 196;
+use Test::More tests => 195;
use Benchmark qw(:all);
-my $delta = 0.4;
+my $DELTA = 0.4;
# Some timing ballast
sub fib {
# Please don't trust the matching parentheses to be useful in this :-)
my $Default_Pattern = qr/$All_Pattern|$Noc_Pattern/;
+# see if the ratio of two integer values is within (1+$delta)
+
+sub cmp_delta {
+ my ($min, $max, $delta) = @_;
+ ($min, $max) = ($max, $min) if $max < $min;
+ return 0 if $min < 1; # avoid / 0
+ return $max/$min <= (1+$delta);
+}
+
my $t0 = new Benchmark;
isa_ok ($t0, 'Benchmark', "Ensure we can create a benchmark object");
is ($foo, 0, "benchmarked code called without arguments");
-print "# Burning CPU to benchmark things will take time...\n";
-
-
+print "# Burning CPU to benchmark things; will take time...\n";
# We need to do something fairly slow in the coderef.
# Same coderef. Same place in memory.
$in_onesec_adj *= (1/$cpu1); # adjust because may not have run for exactly 1s
print "# in_onesec_adj=$in_onesec_adj adjusted iterations\n";
-{
- my $difference = $in_onesec_adj - $estimate;
- my $actual = abs ($difference / $in_onesec_adj);
- cmp_ok($actual, '<=', $delta, "is $in_onesec_adj within $delta of estimate ($estimate)")
- or do {
- diag(" in_threesecs = $in_threesecs");
- diag(" in_threesecs_adj = $in_threesecs_adj");
- diag(" cpu3 = $cpu3");
- diag(" sys3 = $sys3");
- diag(" estimate = $estimate");
- diag(" in_onesec = $in_onesec");
- diag(" in_onesec_adj = $in_onesec_adj");
- diag(" cpu1 = $cpu1");
- diag(" sys1 = $sys1");
- };
-}
# I found that the eval'ed version was 3 times faster than the coderef.
# (now it has a different ballast value)
{
select(OUT);
my $start = times;
- my $chart = cmpthese( -0.1, { a => "++\$i", b => "\$i = sqrt(\$i++)" }, "auto" ) ;
+ my $chart = cmpthese( -0.1, { a => "\$i = sqrt(\$i++) * sqrt(\$i)",
+ b => "\$i = sqrt(\$i++)",
+ }, "auto" ) ;
my $end = times;
select(STDOUT);
ok (($end - $start) > 0.05, "benchmarked code ran for over 0.05 seconds");
{
select(OUT);
my $start = times;
- my $chart = cmpthese( -0.1, { a => "++\$i", b => "\$i = sqrt(\$i++)" } ) ;
+ my $chart = cmpthese( -0.1, { a => "\$i = sqrt(\$i++) * sqrt(\$i)",
+ b => "\$i = sqrt(\$i++)" });
my $end = times;
select(STDOUT);
ok (($end - $start) > 0.05, "benchmarked code ran for over 0.05 seconds");