Thanks for the test case. Having every perl ever released available threaded and unthreaded,
I get the folowing results when I only run on last minor of every major release (see below: left column is sorted on elapsed time, right column is sorted on perl version)
It shows that performance for your test-case was really bad in 5.19, 5.20, 5.21, and 5.22, but it was much better in 5.23 again.
It might be a worrying indicator that 5.31 and 5.32 are slower again then 5.30 and below.
The last release that runs your test comparable to 5.8.8 is 5.18.4 (or 5.16.3)
$ perl-all --time --last testv.pl test.2k.v
Running perl-all testv.pl test.2k.v
On 57 versions of perl
ranging from perl5.6.2 to tperl5.33.6
:
:
rank elapsed cuser csys pass perl | perl
+ rank elapsed
==== ========== ======= ======= ==== ================= | =============
+==== ==== ==========
1 1.53014 1.440 0.090 PASS base/tperl5.6.2 | /usr/bin/perl
+ 4 1.821
2 1.54001 1.450 0.080 PASS base/perl5.6.2 | base/perl5.6.
+2 2 1.540
3 1.77906 1.690 0.100 PASS base/perl5.8.9 | base/tperl5.6
+.2 1 1.530
4 1.82076 1.730 0.090 PASS /usr/bin/perl | base/perl5.7.
+3 26 2.641
5 1.87299 1.790 0.080 PASS base/perl5.9.5 | base/tperl5.7
+.3 27 2.852
6 1.94761 1.850 0.090 PASS base/tperl5.8.9 | base/perl5.8.
+9 3 1.779
7 1.96104 1.880 0.080 PASS base/tperl5.9.5 | base/tperl5.8
+.9 6 1.948
8 2.04763 1.960 0.090 PASS base/perl5.13.11 | base/perl5.9.
+5 5 1.873
9 2.07248 1.990 0.090 PASS base/perl5.12.5 | base/tperl5.9
+.5 7 1.961
10 2.08193 1.990 0.100 PASS base/perl5.14.4 | base/perl5.10
+.1 15 2.171
11 2.08614 1.990 0.090 PASS base/perl5.15.9 | base/tperl5.1
+0.1 19 2.236
12 2.09114 2.010 0.090 PASS base/tperl5.15.9 | base/perl5.11
+.5 21 2.266
13 2.10513 2.020 0.080 PASS base/perl5.16.3 | base/tperl5.1
+1.5 16 2.176
14 2.11247 2.020 0.090 PASS base/tperl5.16.3 | base/perl5.12
+.5 9 2.072
15 2.17058 2.090 0.090 PASS base/perl5.10.1 | base/tperl5.1
+2.5 18 2.216
16 2.17647 2.080 0.100 PASS base/tperl5.11.5 | base/perl5.13
+.11 8 2.048
17 2.19196 2.100 0.090 PASS base/tperl5.14.4 | base/tperl5.1
+3.11 20 2.245
18 2.21637 2.130 0.090 PASS base/tperl5.12.5 | base/perl5.14
+.4 10 2.082
19 2.23559 2.120 0.110 PASS base/tperl5.10.1 | base/tperl5.1
+4.4 17 2.192
20 2.24530 2.150 0.090 PASS base/tperl5.13.11 | base/perl5.15
+.9 11 2.086
21 2.26649 2.180 0.080 PASS base/perl5.11.5 | base/tperl5.1
+5.9 12 2.091
22 2.44358 2.360 0.090 PASS base/tperl5.17.11 | base/perl5.16
+.3 13 2.105
23 2.45182 2.370 0.090 PASS base/perl5.17.11 | base/tperl5.1
+6.3 14 2.112
24 2.47311 2.380 0.100 PASS base/perl5.18.4 | base/perl5.17
+.11 23 2.452
25 2.56640 2.470 0.090 PASS base/tperl5.18.4 | base/tperl5.1
+7.11 22 2.444
26 2.64125 2.540 0.100 PASS base/perl5.7.3 | base/perl5.18
+.4 24 2.473
27 2.85200 2.750 0.100 PASS base/tperl5.7.3 | base/tperl5.1
+8.4 25 2.566
28 4.81823 4.780 0.030 PASS base/perl5.30.3 | base/perl5.19
+.11 54 12.516
29 4.84806 4.800 0.040 PASS base/perl5.28.3 | base/tperl5.1
+9.11 55 12.527
30 4.87266 4.830 0.040 PASS base/perl5.29.10 | base/perl5.20
+.3 57 12.621
31 4.87333 4.840 0.040 PASS base/tperl5.29.10 | base/tperl5.2
+0.3 50 12.173
32 4.90558 4.870 0.030 PASS base/perl5.26.3 | base/perl5.21
+.11 53 12.495
33 4.91229 4.880 0.040 PASS base/perl5.27.11 | base/tperl5.2
+1.11 56 12.529
34 4.93008 4.880 0.050 PASS base/tperl5.26.3 | base/perl5.22
+.4 52 12.443
35 4.94565 4.900 0.040 PASS base/tperl5.30.3 | base/tperl5.2
+2.4 51 12.416
36 4.96723 4.930 0.030 PASS base/perl5.23.9 | base/perl5.23
+.9 36 4.967
37 4.97168 4.940 0.040 PASS base/perl5.24.4 | base/tperl5.2
+3.9 41 5.148
38 5.02614 4.980 0.040 PASS base/tperl5.25.12 | base/perl5.24
+.4 37 4.972
39 5.05600 5.010 0.040 PASS base/tperl5.28.3 | base/tperl5.2
+4.4 43 5.201
40 5.12577 5.080 0.040 PASS base/tperl5.27.11 | base/perl5.25
+.12 42 5.160
41 5.14769 5.110 0.030 PASS base/tperl5.23.9 | base/tperl5.2
+5.12 38 5.026
42 5.16021 5.110 0.040 PASS base/perl5.25.12 | base/perl5.26
+.3 32 4.906
43 5.20146 5.150 0.040 PASS base/tperl5.24.4 | base/tperl5.2
+6.3 34 4.930
44 8.68506 8.640 0.040 PASS base/perl5.32.1 | base/perl5.27
+.11 33 4.912
45 8.84718 8.800 0.040 PASS base/perl5.31.11 | base/tperl5.2
+7.11 40 5.126
46 9.22812 9.200 0.030 PASS base/tperl5.31.11 | base/perl5.28
+.3 29 4.848
47 9.39026 9.360 0.030 PASS base/tperl5.32.1 | base/tperl5.2
+8.3 39 5.056
48 9.56254 9.530 0.040 PASS base/perl5.33.6 | base/perl5.29
+.10 30 4.873
49 10.05364 10.010 0.040 PASS base/tperl5.33.6 | base/tperl5.2
+9.10 31 4.873
50 12.17332 12.130 0.040 PASS base/tperl5.20.3 | base/perl5.30
+.3 28 4.818
51 12.41640 12.380 0.030 PASS base/tperl5.22.4 | base/tperl5.3
+0.3 35 4.946
52 12.44274 12.400 0.030 PASS base/perl5.22.4 | base/perl5.31
+.11 45 8.847
53 12.49524 12.450 0.040 PASS base/perl5.21.11 | base/tperl5.3
+1.11 46 9.228
54 12.51614 12.470 0.040 PASS base/perl5.19.11 | base/perl5.32
+.1 44 8.685
55 12.52714 12.480 0.040 PASS base/tperl5.19.11 | base/tperl5.3
+2.1 47 9.390
56 12.52865 12.480 0.050 PASS base/tperl5.21.11 | base/perl5.33
+.6 48 9.563
57 12.62089 12.570 0.040 PASS base/perl5.20.3 | base/tperl5.3
+3.6 49 10.054
Enjoy, Have FUN! H.Merijn
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