Enable Compression Using GZip
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Applicable To
All Browsers
How Improves Page Load Time
By optimizing network latency (HTTP Payload Size)
Prologue
[Detail of the technology / concept being used in the tip if required]
Why
o Compression can reduce the number of bytes sent over the network
o Dramatic reduction in download time
How
o Web server can compress files in gzip format before sending them for download either by calling a third party module or using built-in routines
o Configure web server to set the Content-Encoding header to gzip format for all compressible resources
o Ensure consistency in HTML and CSS code to make the compression most effective
Exceptions
o Compression is beneficial only for large resources due to the overhead and latency of compression and decompression.
o Compressing files below 150 bytes can actually make them larger
o Don’t use compression for image or other binary files as they are already compressed and applying compression on them will make them larger
Recommendations
o Minify JavaScript and CSS before compression
o Files should be compressed only for a certain size threshold; the recommended value is above 150 and 1000 bytes.
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