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Duncan Sands

2011-Jul-24 10:02 UTC

[LLVMdev] [llvm-testresults] bwilson__llvm-gcc_PROD__i386 nightly tester results

A big compile time regression.  Any ideas?

Ciao, Duncan.

On 22/07/11 19:13, llvm-testresults at cs.uiuc.edu
wrote:>
>   bwilson__llvm-gcc_PROD__i386 nightly tester results
>
> URL	http://llvm.org/perf/db_default/simple/nts/253/
> Nickname	bwilson__llvm-gcc_PROD__i386:4
> Name	curlew.apple.com
>
> Run 	ID 	Order 	Start Time 	End Time
> Current	253	0	2011-07-22 16:22:04	2011-07-22 17:13:53
> Previous	252	0	2011-07-20 07:01:59	2011-07-20 07:51:50
>
>
>       Tests Summary
>
> Status Group	#
> Performance Regressions	88
> Performance Improvements	1
> Unchanged Tests	872
> *Total Tests*	*961*
>
>
>       Changes Detail
>
> Performance Regressions 	Δ	Previous	Current 	σ
> MultiSource/Benchmarks/ASC_Sequoia/IRSmk/IRSmk.compile	12.51%	0.7325	0.8241
0.0102
> SingleSource/UnitTests/ObjC++/property-reference.compile	7.39%	0.9252
0.9936	0.0064
> SingleSource/UnitTests/ObjC++/Hello.compile	7.33%	0.7822	0.8395	0.0015
> MultiSource/Benchmarks/VersaBench/dbms/dbms.compile	7.21%	1.1218	1.2027
0.0173
> MultiSource/Benchmarks/Prolangs-C/gnugo/gnugo.compile	6.93%	0.8243	0.8814
0.0106
> MultiSource/Benchmarks/MiBench/office-ispell/office-ispell.compile	6.48%
1.7091
> 1.8199	0.0047
> MultiSource/Benchmarks/MallocBench/cfrac/cfrac.compile	6.45%	1.0109	1.0761
0.0116
> MultiSource/Benchmarks/ASCI_Purple/SMG2000/smg2000.compile	6.44%	6.6061
7.0314
> 0.0251
> MultiSource/Benchmarks/MiBench/consumer-lame/consumer-lame.compile	6.34%
4.5856
> 4.8764	0.0186
> MultiSource/Applications/hbd/hbd.compile	6.34%	1.7050	1.8131	0.0110
> MultiSource/Benchmarks/Prolangs-C/TimberWolfMC/timberwolfmc.compile	6.34%
> 8.0582	8.5687	0.0539
> MultiSource/Benchmarks/MiBench/automotive-susan/automotive-susan.compile
6.33%
> 1.0136	1.0778	0.0021
> External/SPEC/CINT95/134_perl/134_perl.compile	6.31%	6.3453	6.7457	0.0206
> External/SPEC/CFP2006/433_milc/433_milc.compile	6.29%	3.6706	3.9015	0.0293
> External/SPEC/CINT2006/462_libquantum/462_libquantum.compile	6.26%	0.9149
> 0.9722	0.0070
> MultiSource/Applications/spiff/spiff.compile	6.25%	0.8954	0.9514	0.0059
> External/SPEC/CINT2000/175_vpr/175_vpr.compile	6.23%	3.0709	3.2621	0.0103
> External/skidmarks10/skidmarks.compile	6.20%	1.9730	2.0953	0.0087
> MultiSource/Applications/SIBsim4/SIBsim4.compile	6.19%	1.2870	1.3667	0.0026
> External/SPEC/CINT2000/186_crafty/186_crafty.compile	6.19%	4.4605	4.7364
0.0167
> External/SPEC/CINT95/124_m88ksim/124_m88ksim.compile	6.09%	4.7899	5.0818
0.0451
> MultiSource/Benchmarks/Prolangs-C/unix-tbl/unix-tbl.compile	6.06%	1.1575
1.2277
> 0.0090
> External/SPEC/CINT2000/300_twolf/300_twolf.compile	6.03%	5.9226	6.2799
0.0316
> External/SPEC/CINT2006/464_h264ref/464_h264ref.compile	6.01%	15.1997
16.1135	0.0271
> MultiSource/Benchmarks/mediabench/mpeg2/mpeg2dec/mpeg2decode.compile	6.01%
> 1.3943	1.4781	0.0062
> External/SPEC/CFP2000/188_ammp/188_ammp.compile	5.96%	3.1941	3.3844	0.0145
> External/SPEC/CINT2000/164_gzip/164_gzip.compile	5.95%	1.2469	1.3211	0.0059
> External/SPEC/CINT2006/458_sjeng/458_sjeng.compile	5.94%	2.6209	2.7767
0.0098
> MultiSource/Benchmarks/Ptrdist/bc/bc.compile	5.93%	1.1847	1.2550	0.0041
> External/Nurbs/nurbs.compile	5.90%	1.8470	1.9559	0.0087
> MultiSource/Applications/lemon/lemon.compile	5.90%	1.0516	1.1136	0.0027
> MultiSource/Benchmarks/MiBench/consumer-typeset/consumer-typeset.compile
5.88%
> 14.2650	15.1031	0.0341
> External/SPEC/CINT2000/255_vortex/255_vortex.compile	5.87%	9.3345	9.8822
0.0331
> MultiSource/Benchmarks/MallocBench/gs/gs.compile	5.84%	4.3921	4.6488	0.0275
> External/SPEC/CINT95/132_ijpeg/132_ijpeg.compile	5.79%	4.8337	5.1137	0.0279
> External/SPEC/CINT2006/400_perlbench/400_perlbench.compile	5.77%	26.7023
> 28.2429	0.0181
> MultiSource/Benchmarks/MallocBench/espresso/espresso.compile	5.76%	4.3083
> 4.5565	0.0220
> MultiSource/Applications/ClamAV/clamscan.compile	5.72%	15.6832	16.5806
0.0426
> External/SPEC/CINT95/147_vortex/147_vortex.compile	5.71%	9.3411	9.8746
0.0273
> External/SPEC/CINT2006/456_hmmer/456_hmmer.compile	5.70%	7.2198	7.6315
0.0233
> MultiSource/Benchmarks/Prolangs-C/bison/mybison.compile	5.69%	1.4666	1.5500
0.0065
> MultiSource/Benchmarks/mafft/pairlocalalign.compile	5.68%	8.3147	8.7866
0.0145
> External/SPEC/CINT2000/254_gap/254_gap.compile	5.67%	11.7409	12.4065	0.0259
> MultiSource/Benchmarks/Prolangs-C/agrep/agrep.compile	5.66%	1.2889	1.3618
0.0052
> External/SPEC/CINT2000/197_parser/197_parser.compile	5.65%	3.0761	3.2498
0.0068
> External/SPEC/CINT95/126_gcc/126_gcc.compile	5.63%	28.6901	30.3046	0.0488
> MultiSource/Applications/Burg/burg.compile	5.62%	1.3485	1.4243	0.0081
> External/SPEC/CINT2000/176_gcc/176_gcc.compile	5.62%	32.4644	34.2887	0.0358
> MultiSource/Benchmarks/mediabench/jpeg/jpeg-6a/cjpeg.compile	5.60%	4.6491
> 4.9096	0.0183
> External/SPEC/CINT2006/403_gcc/403_gcc.compile	5.60%	75.1560	79.3658	0.1151
> MultiSource/Applications/d/make_dparser.compile	5.60%	3.0244	3.1938	0.0059
> External/SPEC/CINT95/130_li/130_li.compile	5.60%	1.6850	1.7793	0.0121
> SingleSource/Benchmarks/Misc-C++/stepanov_container.compile	5.59%	0.9634
1.0173
> 0.0025
> External/SPEC/CINT2000/253_perlbmk/253_perlbmk.compile	5.58%	13.0643
13.7938	0.0156
> MultiSource/Applications/lua/lua.compile	5.56%	3.9109	4.1285	0.0105
> External/SPEC/CFP2006/444_namd/444_namd.compile	5.54%	6.8800	7.2614	0.0155
> MultiSource/Benchmarks/MiBench/consumer-jpeg/consumer-jpeg.compile	5.52%
4.5839
> 4.8371	0.0243
> MultiSource/Applications/treecc/treecc.compile	5.49%	2.1294	2.2464	0.0057
> External/SPEC/CINT2006/471_omnetpp/471_omnetpp.compile	5.45%	37.9810
40.0522	0.0756
> External/Povray/povray.compile	5.45%	15.6471	16.4994	0.0367
> MultiSource/Applications/JM/lencod/lencod.compile	5.43%	16.6604	17.5654
0.0217
> MultiSource/Applications/sqlite3/sqlite3.compile	5.39%	13.7047	14.4433
0.0256
> MultiSource/Applications/oggenc/oggenc.compile	5.32%	5.6388	5.9386	0.0096
> MultiSource/Applications/SPASS/SPASS.compile	5.19%	14.2322	14.9711	0.0342
> External/SPEC/CINT2006/483_xalancbmk/483_xalancbmk.compile	5.19%	225.5995
> 237.3023	0.6599
> External/SPEC/CINT95/099_go/099_go.compile	5.15%	4.8824	5.1339	0.0061
> MultiSource/Applications/kimwitu++/kc.compile	5.14%	19.5797	20.5852	0.0206
> MultiSource/Applications/JM/ldecod/ldecod.compile	5.13%	7.1410	7.5074
0.0136
> External/SPEC/CINT2006/401_bzip2/401_bzip2.compile	5.09%	2.1246	2.2328
0.0027
> External/SPEC/CINT2006/473_astar/473_astar.compile	5.07%	1.2970	1.3628
0.0028
> SingleSource/Benchmarks/Adobe-C++/loop_unroll.compile	5.07%	3.2894	3.4561
0.0073
> SingleSource/Benchmarks/Adobe-C++/simple_types_constant_folding.compile
4.95%
> 2.5774	2.7051	0.0062
> MultiSource/Applications/siod/siod.compile	4.95%	2.2539	2.3655	0.0032
> SingleSource/Benchmarks/Misc-C++-EH/spirit.compile	4.95%	8.5869	9.0116
0.0067
> MultiSource/Applications/hexxagon/hexxagon.compile	4.93%	1.3692	1.4367
0.0063
> SingleSource/Benchmarks/Adobe-C++/simple_types_loop_invariant.compile	4.92%
> 1.8446	1.9353	0.0034
> MultiSource/Benchmarks/PAQ8p/paq8p.compile	4.87%	2.1966	2.3036	0.0042
> MultiSource/Benchmarks/mediabench/gsm/toast/toast.compile	4.83%	1.4938
1.5659	0.0091
> External/SPEC/CINT2006/445_gobmk/445_gobmk.compile	4.82%	20.0066	20.9703
0.0476
> MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4.compile	4.80%	24.0258	25.1794
0.0370
> MultiSource/Benchmarks/MiBench/telecomm-gsm/telecomm-gsm.compile	4.72%
1.4965
> 1.5671	0.0087
> External/SPEC/CINT2000/252_eon/252_eon.compile	4.63%	49.1369	51.4099	0.0933
> External/SPEC/CFP2006/447_dealII/447_dealII.compile	4.57%	145.5494	152.2079
0.1508
> MultiSource/Benchmarks/Bullet/bullet.compile	4.49%	46.0510	48.1199	0.0419
> MultiSource/Benchmarks/Prolangs-C++/city/city.compile	4.44%	2.2055	2.3035
0.0105
> External/SPEC/CFP2006/450_soplex/450_soplex.compile	3.85%	31.6364	32.8541
0.0750
> MultiSource/Benchmarks/llubenchmark/llu.exec	1.99%	3.5675	3.6385	0.0213
> External/SPEC/CFP2000/177_mesa/177_mesa.compile	1.42%	14.8597	15.0713
0.0313
>
> Performance Improvements 	Δ	Previous	Current 	σ
> External/SPEC/CINT2006/400_perlbench/400_perlbench.exec	-2.54%	9.5618
9.3186	0.0943
>
>
>
> _______________________________________________
> llvm-testresults mailing list
> llvm-testresults at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-testresults

Bob Wilson

2011-Jul-24 23:59 UTC

head link

[LLVMdev] [llvm-testresults] bwilson__llvm-gcc_PROD__i386 nightly tester results

On Jul 24, 2011, at 3:02 AM, Duncan Sands wrote:
> A big compile time regression.  Any ideas?
> 
> Ciao, Duncan.
False alarm.  For some reason that I have not yet been able to figure out, these
tests run significantly more slowly when I run them during the daytime, which I
did for that run.  I checked a few of the worst regressions reported here and
they all recovered in subsequent runs.
> 
> On 22/07/11 19:13, llvm-testresults at cs.uiuc.edu wrote:
>> 
>>  bwilson__llvm-gcc_PROD__i386 nightly tester results
>> 
>> URL	http://llvm.org/perf/db_default/simple/nts/253/
>> Nickname	bwilson__llvm-gcc_PROD__i386:4
>> Name	curlew.apple.com
>> 
>> Run 	ID 	Order 	Start Time 	End Time
>> Current	253	0	2011-07-22 16:22:04	2011-07-22 17:13:53
>> Previous	252	0	2011-07-20 07:01:59	2011-07-20 07:51:50
>> 
>> 
>>      Tests Summary
>> 
>> Status Group	#
>> Performance Regressions	88
>> Performance Improvements	1
>> Unchanged Tests	872
>> *Total Tests*	*961*
>> 
>> 
>>      Changes Detail
>> 
>> Performance Regressions 	Δ	Previous	Current 	σ
>> MultiSource/Benchmarks/ASC_Sequoia/IRSmk/IRSmk.compile	12.51%	0.7325
0.8241	0.0102
>> SingleSource/UnitTests/ObjC++/property-reference.compile	7.39%	0.9252
0.9936	0.0064
>> SingleSource/UnitTests/ObjC++/Hello.compile	7.33%	0.7822	0.8395	0.0015
>> MultiSource/Benchmarks/VersaBench/dbms/dbms.compile	7.21%	1.1218	1.2027
0.0173
>> MultiSource/Benchmarks/Prolangs-C/gnugo/gnugo.compile	6.93%	0.8243
0.8814	0.0106
>> MultiSource/Benchmarks/MiBench/office-ispell/office-ispell.compile
6.48%	1.7091
>> 1.8199	0.0047
>> MultiSource/Benchmarks/MallocBench/cfrac/cfrac.compile	6.45%	1.0109
1.0761	0.0116
>> MultiSource/Benchmarks/ASCI_Purple/SMG2000/smg2000.compile	6.44%	6.6061
7.0314
>> 0.0251
>> MultiSource/Benchmarks/MiBench/consumer-lame/consumer-lame.compile
6.34%	4.5856
>> 4.8764	0.0186
>> MultiSource/Applications/hbd/hbd.compile	6.34%	1.7050	1.8131	0.0110
>> MultiSource/Benchmarks/Prolangs-C/TimberWolfMC/timberwolfmc.compile
6.34%
>> 8.0582	8.5687	0.0539
>>
MultiSource/Benchmarks/MiBench/automotive-susan/automotive-susan.compile	6.33%
>> 1.0136	1.0778	0.0021
>> External/SPEC/CINT95/134_perl/134_perl.compile	6.31%	6.3453	6.7457
0.0206
>> External/SPEC/CFP2006/433_milc/433_milc.compile	6.29%	3.6706	3.9015
0.0293
>> External/SPEC/CINT2006/462_libquantum/462_libquantum.compile	6.26%
0.9149
>> 0.9722	0.0070
>> MultiSource/Applications/spiff/spiff.compile	6.25%	0.8954	0.9514	0.0059
>> External/SPEC/CINT2000/175_vpr/175_vpr.compile	6.23%	3.0709	3.2621
0.0103
>> External/skidmarks10/skidmarks.compile	6.20%	1.9730	2.0953	0.0087
>> MultiSource/Applications/SIBsim4/SIBsim4.compile	6.19%	1.2870	1.3667
0.0026
>> External/SPEC/CINT2000/186_crafty/186_crafty.compile	6.19%	4.4605
4.7364	0.0167
>> External/SPEC/CINT95/124_m88ksim/124_m88ksim.compile	6.09%	4.7899
5.0818	0.0451
>> MultiSource/Benchmarks/Prolangs-C/unix-tbl/unix-tbl.compile	6.06%
1.1575	1.2277
>> 0.0090
>> External/SPEC/CINT2000/300_twolf/300_twolf.compile	6.03%	5.9226	6.2799
0.0316
>> External/SPEC/CINT2006/464_h264ref/464_h264ref.compile	6.01%	15.1997
16.1135	0.0271
>> MultiSource/Benchmarks/mediabench/mpeg2/mpeg2dec/mpeg2decode.compile
6.01%
>> 1.3943	1.4781	0.0062
>> External/SPEC/CFP2000/188_ammp/188_ammp.compile	5.96%	3.1941	3.3844
0.0145
>> External/SPEC/CINT2000/164_gzip/164_gzip.compile	5.95%	1.2469	1.3211
0.0059
>> External/SPEC/CINT2006/458_sjeng/458_sjeng.compile	5.94%	2.6209	2.7767
0.0098
>> MultiSource/Benchmarks/Ptrdist/bc/bc.compile	5.93%	1.1847	1.2550	0.0041
>> External/Nurbs/nurbs.compile	5.90%	1.8470	1.9559	0.0087
>> MultiSource/Applications/lemon/lemon.compile	5.90%	1.0516	1.1136	0.0027
>>
MultiSource/Benchmarks/MiBench/consumer-typeset/consumer-typeset.compile	5.88%
>> 14.2650	15.1031	0.0341
>> External/SPEC/CINT2000/255_vortex/255_vortex.compile	5.87%	9.3345
9.8822	0.0331
>> MultiSource/Benchmarks/MallocBench/gs/gs.compile	5.84%	4.3921	4.6488
0.0275
>> External/SPEC/CINT95/132_ijpeg/132_ijpeg.compile	5.79%	4.8337	5.1137
0.0279
>> External/SPEC/CINT2006/400_perlbench/400_perlbench.compile	5.77%
26.7023
>> 28.2429	0.0181
>> MultiSource/Benchmarks/MallocBench/espresso/espresso.compile	5.76%
4.3083
>> 4.5565	0.0220
>> MultiSource/Applications/ClamAV/clamscan.compile	5.72%	15.6832	16.5806
0.0426
>> External/SPEC/CINT95/147_vortex/147_vortex.compile	5.71%	9.3411	9.8746
0.0273
>> External/SPEC/CINT2006/456_hmmer/456_hmmer.compile	5.70%	7.2198	7.6315
0.0233
>> MultiSource/Benchmarks/Prolangs-C/bison/mybison.compile	5.69%	1.4666
1.5500	0.0065
>> MultiSource/Benchmarks/mafft/pairlocalalign.compile	5.68%	8.3147	8.7866
0.0145
>> External/SPEC/CINT2000/254_gap/254_gap.compile	5.67%	11.7409	12.4065
0.0259
>> MultiSource/Benchmarks/Prolangs-C/agrep/agrep.compile	5.66%	1.2889
1.3618	0.0052
>> External/SPEC/CINT2000/197_parser/197_parser.compile	5.65%	3.0761
3.2498	0.0068
>> External/SPEC/CINT95/126_gcc/126_gcc.compile	5.63%	28.6901	30.3046
0.0488
>> MultiSource/Applications/Burg/burg.compile	5.62%	1.3485	1.4243	0.0081
>> External/SPEC/CINT2000/176_gcc/176_gcc.compile	5.62%	32.4644	34.2887
0.0358
>> MultiSource/Benchmarks/mediabench/jpeg/jpeg-6a/cjpeg.compile	5.60%
4.6491
>> 4.9096	0.0183
>> External/SPEC/CINT2006/403_gcc/403_gcc.compile	5.60%	75.1560	79.3658
0.1151
>> MultiSource/Applications/d/make_dparser.compile	5.60%	3.0244	3.1938
0.0059
>> External/SPEC/CINT95/130_li/130_li.compile	5.60%	1.6850	1.7793	0.0121
>> SingleSource/Benchmarks/Misc-C++/stepanov_container.compile	5.59%
0.9634	1.0173
>> 0.0025
>> External/SPEC/CINT2000/253_perlbmk/253_perlbmk.compile	5.58%	13.0643
13.7938	0.0156
>> MultiSource/Applications/lua/lua.compile	5.56%	3.9109	4.1285	0.0105
>> External/SPEC/CFP2006/444_namd/444_namd.compile	5.54%	6.8800	7.2614
0.0155
>> MultiSource/Benchmarks/MiBench/consumer-jpeg/consumer-jpeg.compile
5.52%	4.5839
>> 4.8371	0.0243
>> MultiSource/Applications/treecc/treecc.compile	5.49%	2.1294	2.2464
0.0057
>> External/SPEC/CINT2006/471_omnetpp/471_omnetpp.compile	5.45%	37.9810
40.0522	0.0756
>> External/Povray/povray.compile	5.45%	15.6471	16.4994	0.0367
>> MultiSource/Applications/JM/lencod/lencod.compile	5.43%	16.6604	17.5654
0.0217
>> MultiSource/Applications/sqlite3/sqlite3.compile	5.39%	13.7047	14.4433
0.0256
>> MultiSource/Applications/oggenc/oggenc.compile	5.32%	5.6388	5.9386
0.0096
>> MultiSource/Applications/SPASS/SPASS.compile	5.19%	14.2322	14.9711
0.0342
>> External/SPEC/CINT2006/483_xalancbmk/483_xalancbmk.compile	5.19%
225.5995
>> 237.3023	0.6599
>> External/SPEC/CINT95/099_go/099_go.compile	5.15%	4.8824	5.1339	0.0061
>> MultiSource/Applications/kimwitu++/kc.compile	5.14%	19.5797	20.5852
0.0206
>> MultiSource/Applications/JM/ldecod/ldecod.compile	5.13%	7.1410	7.5074
0.0136
>> External/SPEC/CINT2006/401_bzip2/401_bzip2.compile	5.09%	2.1246	2.2328
0.0027
>> External/SPEC/CINT2006/473_astar/473_astar.compile	5.07%	1.2970	1.3628
0.0028
>> SingleSource/Benchmarks/Adobe-C++/loop_unroll.compile	5.07%	3.2894
3.4561	0.0073
>> SingleSource/Benchmarks/Adobe-C++/simple_types_constant_folding.compile
4.95%
>> 2.5774	2.7051	0.0062
>> MultiSource/Applications/siod/siod.compile	4.95%	2.2539	2.3655	0.0032
>> SingleSource/Benchmarks/Misc-C++-EH/spirit.compile	4.95%	8.5869	9.0116
0.0067
>> MultiSource/Applications/hexxagon/hexxagon.compile	4.93%	1.3692	1.4367
0.0063
>> SingleSource/Benchmarks/Adobe-C++/simple_types_loop_invariant.compile
4.92%
>> 1.8446	1.9353	0.0034
>> MultiSource/Benchmarks/PAQ8p/paq8p.compile	4.87%	2.1966	2.3036	0.0042
>> MultiSource/Benchmarks/mediabench/gsm/toast/toast.compile	4.83%	1.4938
1.5659	0.0091
>> External/SPEC/CINT2006/445_gobmk/445_gobmk.compile	4.82%	20.0066
20.9703	0.0476
>> MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4.compile	4.80%	24.0258
25.1794	0.0370
>> MultiSource/Benchmarks/MiBench/telecomm-gsm/telecomm-gsm.compile	4.72%
1.4965
>> 1.5671	0.0087
>> External/SPEC/CINT2000/252_eon/252_eon.compile	4.63%	49.1369	51.4099
0.0933
>> External/SPEC/CFP2006/447_dealII/447_dealII.compile	4.57%	145.5494
152.2079	0.1508
>> MultiSource/Benchmarks/Bullet/bullet.compile	4.49%	46.0510	48.1199
0.0419
>> MultiSource/Benchmarks/Prolangs-C++/city/city.compile	4.44%	2.2055
2.3035	0.0105
>> External/SPEC/CFP2006/450_soplex/450_soplex.compile	3.85%	31.6364
32.8541	0.0750
>> MultiSource/Benchmarks/llubenchmark/llu.exec	1.99%	3.5675	3.6385	0.0213
>> External/SPEC/CFP2000/177_mesa/177_mesa.compile	1.42%	14.8597	15.0713
0.0313
>> 
>> Performance Improvements 	Δ	Previous	Current 	σ
>> External/SPEC/CINT2006/400_perlbench/400_perlbench.exec	-2.54%	9.5618
9.3186	0.0943
>> 
>> 
>> 
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Duncan Sands

2011-Jul-25 15:10 UTC

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[LLVMdev] [llvm-testresults] bwilson__llvm-gcc_PROD__i386 nightly tester results

Hi Bob,
>> A big compile time regression.  Any ideas?
>>
>> Ciao, Duncan.
>
> False alarm.  For some reason that I have not yet been able to figure out,
these tests run significantly more slowly when I run them during the daytime,
which I did for that run.  I checked a few of the worst regressions reported
here and they all recovered in subsequent runs.
here is a crazy idea: during the day the room the computer is in is hotter,
and to avoid overheating the CPU frequency is reduced, resulting in the machine
running slower.

Ciao, Duncan.

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