Compress your output

The solution is to enable output buffering, and to use gzip compression for the buffers. Output buffering, if you were unaware, makes PHP store up its data into one big chunk, then send it to Apache all at once. Because all the data is kept together and sent all at once, PHP is able to compress it using gzip compression, which will generally reduce the content to around 33% of its original size (that is, 1MB will become 300KB).