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<?php $string = str_repeat("0123456789", 100); $resource = fopen('data://text/plain,' . $string,'r'); stream_filter_append($resource, 'zlib.deflate', STREAM_FILTER_READ, 6); $compressed = stream_get_contents($resource); echo strlen($compressed);
Output for git.master, git.master_jit, rfc.property-hooks
27

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