upstream #996

Job	Run time
html5lib-tests	53s
html5lib-tests	53s
ruby-head (ubuntu, enable)	46s
ruby-head (ubuntu, enable)	46s
ruby-head-valgrind (enable)	7m 5s
ruby-head-valgrind (enable)	7m 5s
jruby-head	1m 18s
jruby-head	1m 18s
ruby-head (ubuntu, disable)	2m 53s
ruby-head (ubuntu, disable)	2m 53s
ruby-head-valgrind (disable)	4m 52s
ruby-head-valgrind (disable)	4m 52s
ruby-head (windows, enable)	3m 19s
ruby-head (windows, enable)	3m 19s
truffleruby-head (--disable-system-libraries --disable-static)	5m 2s
truffleruby-head (--disable-system-libraries --disable-static)	5m 2s
xmlsoft-head (ubuntu)	2m 0s
xmlsoft-head (ubuntu)	1m 37s
ruby-head (windows, disable)	10m 9s
ruby-head (windows, disable)	10m 9s
truffleruby-head (--disable-system-libraries --enable-static)	2m 59s
truffleruby-head (--disable-system-libraries --enable-static)	2m 59s
xmlsoft-head-valgrind	3m 30s
xmlsoft-head-valgrind	3m 30s
xmlsoft-head (windows)	11m 42s
xmlsoft-head (windows)	8m 5s
ruby-head (macos, enable)	3m 19s
ruby-head (macos, enable)	3m 19s
truffleruby-head (--enable-system-libraries)	2m 39s
truffleruby-head (--enable-system-libraries)	2m 39s
ruby-head (macos, disable)	1m 18s
ruby-head (macos, disable)	1m 18s
xmlsoft-head (macos)	2m 21s
xmlsoft-head (macos)	2m 18s
	2h 8m 7s

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