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Thank you very much. Your statements helped me a lot. I see that at the second run, no new symbols will be added to the symbol-table. But why the memory is increased by 548 KB?
use XML::Simple; use Devel::Symdump; Devel::Symdump->rnew(); # init CProcess->PrintProcessInfo("perl.exe"); { my $xs = new XML::Simple(); my $root= $xs->XMLin('D:\xTools\test\xmltest.xml'); } CProcess->PrintProcessInfo("perl.exe"); my $dump = Devel::Symdump->rnew(); { my $xs = new XML::Simple(); my $root= $xs->XMLin('D:\xTools\test\xmltest.xml'); } CProcess->PrintProcessInfo("perl.exe"); print "---------\nAdded new to symbol-table:\n"; print $dump->diff(Devel::Symdump->rnew()); print "---------\n";

Process-ID 9372: Memory 34952 KB (+34952 KB) - Peak 34952 KB - Threads 3 - Handles 118 (perl)

Process-ID 9372: Memory 133784 KB (+98832 KB) - Peak 145704 KB - Threads 3 - Handles 118 (perl)

Process-ID 9372: Memory 134332 KB ( +548 KB) - Peak 146596 KB - Threads 3 - Handles 118 (perl)

---------

Added new to symbol-table:

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In reply to Re^2: How can I free the memory of a XML::Simple-Object by Bauldric
in thread How can I free the memory of a XML::Simple-Object by Bauldric

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