User:Hashar/bug41607

Install a snapshot of MediaWiki using sqlite:

wget https://integration.mediawiki.org/nightly/mediawiki/core/mediawiki-78a5729.zip
unzip mediawiki-78a5729.zip
cd mediawiki-78a5729
# Install a basic database using sqlite as a backend
php maintenance/install.php benchwiki sysop --pass secret --dbtype sqlite --dbpath .

# Run the Dump test suite
php tests/phpunit/phpunit.php --group Dump

With strace -c (count):

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 69.86    0.022932           0   5117222           rt_sigprocmask
 16.49    0.005412         677         8           clone
 12.19    0.004000           5       760           fsync
  0.64    0.000209           0      9063        16 lseek
  0.56    0.000183           0     11384           write
  0.08    0.000026           0      1226        20 open
  0.05    0.000015           0      1293           close
  0.04    0.000014           0       567           brk
  0.04    0.000014           0      1193       786 access
  0.04    0.000012           0      3589           fstat
snip...