Lighttpd

mod_deflate¶

mod_deflate is available in lighttpd 1.4.42 and later. mod_deflate differs from mod_compress in that mod_deflate can compress any output from lighttpd static or dynamic. mod_deflate does not support caching compressed output like mod_compress.

Module options:

deflate.mimetypes = ("text/html", "text/plain", "text/css", "text/javascript", "text/xml")
#deflate.mimetypes = ("text/")       # prefix matches all text/* Content-Type responses
deflate.allowed_encodings = ( "bzip2", "gzip", "deflate" )
deflate.max-compress-size = 131072   # measured in kilobytes, so 131072 indicates 128 MB
deflate.min-compress-size = 256      # measured in bytes
deflate.compression-level = 9
#deflate.output-buffer-size = 8192
deflate.work-block-size = 2048

max-compress-size is the largest response size that will be compressed.
min-compress-size is the smallest response size that will be compressed.

output-buffer-size is a per connection buffer for compressed output, it can
help decrease the response size (fewer chunks to encode). If it is set to
zero, a shared buffer will be used.

work-block-size is the number of kilobytes to compress at one time, it allows
the webserver to do other work (network I/O) in between compression.

Known Limitation¶

mod_deflate currently does not stream compressed content in chunks. This affects very large dynamic responses, or dynamic responses sent in chunks with large time lapses between chunks.