Previously h2load used default flow control window as described in
HTTP/2 and SPDY specification. The window size is 64KiB, which is a
bit small, and cannot utilize full server performance when response
size is not too small. Basically, we do this kind of benchmarking
test to measure server's throughput, and optimal performance. Smaller
window certainly degrades performance even in local testing because
server is so fast that it has to wait for WINDOW_UPDATE from h2load.
To make default behaviour suitable for peak performance test, we
decided to disable flow control in h2load by setting large enough
window size.
Most users used h2load without -w or -W options, so they were
implicitly throttled by flow control and the result was affected by
that negatively. Now flow control is disabled by default, the result
may improve depending on the implementations.
Implement fd caching for static files. The response body for such as
404 was dynamically generated previously, but now it is written in
temporally file and its fd is cached. Currently, cache is reference
counted and expired when count becomes 0. This makes caching is not
effective other than "busy" period, but we don't need this feature if
we are not busy.
In this commit, we made --dep-idle behaviour by default. This is
because the previous default behaviour is not reflect current usage of
dependency priority and never will be because of fragility of tree due
to stream closure.
nghttp2 library now use Literal Header Field never Indexed for
"authorization" header field and small "cookie" header field,
regardless of nghttp2_nv.flags.
Since libev handles SIGCHLD, using waitpid in separate thread to wait
for the completion of fetch-ocsp-response script process is undefined.
This commit rewrite ocsp handling code so that it utilizes libev
ev_child watcher and perform ocsp update without thread.
Previously we send RST_STREAM when we send DATA with END_STREAM flag
set. With this commit, we also do this when we send HEADERS with
END_STREAM flag set.
Tatsuhiro Tsujikawa
Alex Nalivko
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Xiaoguang Sun
Tatsuhiko Kubo