even it is written that ZipArchive is faster PclZip is the default. Why? Is the compression rate with PclZip much better or does it perform in other parts much better and therefore it is the default? It is a bit confusing as usually I think it would be useful if the compression takes not to much memory and time. Perhaps someone can give a recommendation. Thanks! Andi
ZipArchive - In most cases ZipArchive is built into PHP and generally faster than PclZIP. This library primarily uses files instead of memory for temporary storage when compressing large files.
PclZip - is part of the WordPress core libraries. It will be slower than built-in PHP functions like ZipArchive. This library uses memory instead of files for temporary storage when compressing large files.