periodically flush intermediate chunkqueue to r->write_queue
to reduce occurrence of copying to reallocate larger chunk
use chunk_buffer to read ssi file
send large dir listings to tempfiles
send large header and footers (readme) to tempfiles if XML-encoding
separate header and footer HTML generation from
directory read and HTML generation for dir and files
code reuse, cleanup
reduce some string copying for include file paths
default is clock jump > 30 mins (1800 seconds)
server.feature-flags += ("server.clock-jump-restart" => 1800)
Can be set to 0 to disable.
x-ref:
"TLS 1.3 with SessionTicket fail for the first 8 hours of 1970"
https://redmine.lighttpd.net/issues/3075
optimize buffer_* primitives
Other than buffer_string_set_length(), reallocate with one power-2 step
in size (or use the requested size, if larger). This replaces the fixed
BUFFER_PIECE_SIZE round-up of only 64 bytes extension each reallocation,
which could lead to excessive reallocations in some scenarios.
buffer_extend() convenience routine to prep for batch append
(combines buffer_string_prepare_append() and buffer_commit())
mod_fastcgi, mod_scgi, mod_proxy and others now leverage buffer_extend()
mod_scgi directly performs little-endian encoding of short ints
http_response_write_header() optimizes writing response header,
leveraging buffer_extend()
modify mod_proxy to append line ends
similar to how it is done in http_response_write_header()
(removes one call to buffer_append_string_len())
use keyvalue.[ch] for basic matching
consolidate PCRE logic and leverage PCRE study in keyvalue.[ch]
remove direct link to -lpcre from modules using keyvalue.[ch]
enabled by default
disable using server.feature-flags += ("server.pcre_jit" => "disable")
Available since pcre-8.20 (2011), and improved in pcre-8.32 (2012),
PCRE_STUDY_JIT_COMPILE can greatly speed up repeated execution of PCRE
patterns. (https://zherczeg.github.io/sljit/pcre.html)
lighttpd continues to use pcre_exec() instead of pcre_jit_exec(),
even though doing so does not realize all of the performance increase
potentially available with PCRE_STUDY_JIT_COMPILE and pcre_jit_exec().
pcre_jit_exec() is available with PCRE 8.32 and later, if PCRE is
compiled with --enable-jit, but lighttpd does not currently use
pcre_jit_exec() since the PCRE library might not have been compiled
with --enable-jit (though this could be solved with a weak symbol).
Similarly, lighttpd does not currently configure the pcre_jit_stack.
(Using pcre_jit_exec() may be revisited in the future.)
x-ref:
"add support for pcre JIT"
https://redmine.lighttpd.net/issues/2361
