I can't see any problem with that. You might save a little more time by avoiding copying the strings twice: 

push(@total_content, $content);
...
$response->add_content(join('', map $$_, @total_content));

[download]
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In reply to Re^3: LWP slow downloads on windows (50 times faster?) by BrowserUk
in thread LWP slow downloads on windows by robobunny

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