More anecdotal data, with a one-liner test:

Activestate Perl 5.10.0 on XP+SP2: 

>perl -v

This is perl, v5.10.0 built for MSWin32-x86-multi-thread
[snip]
Binary build 1004 [287188] provided by ActiveState http://www.ActiveSt
+ate.com
Built Sep  3 2008 13:16:37
[snip]

>perl -MBenchmark -lwe "my$x=q//; print timestr(timeit(eval($ARGV[0]),
+sub{$x .= (q/x/ x 1000);}));" 10_000
64 wallclock secs (37.05 usr + 25.88 sys = 62.92 CPU) @ 158.93/s (n=10
+000)

[download]
(100,000 was obviously taking forever, so I skipped it.)

Cygwin Perl 5.10.0 on the same system: 

# perl -v

This is perl, v5.10.0 built for cygwin-thread-multi-64int
[snip]

# perl -MBenchmark -lwe 'my$x=q//; print timestr(timeit(eval($ARGV[0])
+,sub{$x .= (q/x/ x 1000);}));' 10_000
 1 wallclock secs ( 0.06 usr +  0.00 sys =  0.06 CPU) @ 158730.16/s (n
+=10000)

#  perl -MBenchmark -lwe 'my$x=q//; print timestr(timeit(eval($ARGV[0]
+),sub{$x .= (q/x/ x 1000);}));' 100_000
 1 wallclock secs ( 0.61 usr +  0.03 sys =  0.64 CPU) @ 156006.24/s (n
+=100000)

[download]

In reply to Re: Why is Windows 100 times slower than Linux when growing a large scalar? by Anonymous Monk
in thread Why is Windows 100 times slower than Linux when growing a large scalar? by Anonymous Monk

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