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| author | Markus Armbruster | 2018-02-11 10:35:48 +0100 |
|---|---|---|
| committer | Eric Blake | 2018-03-02 20:14:09 +0100 |
| commit | 907b846653fb3757bf2ab98d6d66f92df34d875f (patch) | |
| tree | d4ea513585b3435789c3f5bccb6ff1b6cc8c0cf3 /tests/test-keyval.c | |
| parent | qapi-gen: Convert from getopt to argparse (diff) | |
| download | qemu-907b846653fb3757bf2ab98d6d66f92df34d875f.tar.gz qemu-907b846653fb3757bf2ab98d6d66f92df34d875f.tar.xz qemu-907b846653fb3757bf2ab98d6d66f92df34d875f.zip | |
qapi: Touch generated files only when they change
A massive number of objects depends on QAPI-generated headers. In my
"build everything" tree, it's roughly 4800 out of 5100. This is
particularly annoying when only some of the generated files change,
say for a doc fix.
Improve qapi-gen.py to touch its output files only if they actually
change. Rebuild time for a QAPI doc fix drops from many minutes to a
few seconds. Rebuilds get faster for certain code changes, too. For
instance, adding a simple QMP event now recompiles less than 200
instead of 4800 objects. But adding a QAPI type is as bad as ever;
we've clearly got more work to do.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180211093607.27351-11-armbru@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
[eblake: fix octal constant for python3]
Signed-off-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'tests/test-keyval.c')
0 files changed, 0 insertions, 0 deletions