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f31227e628
ijson < 2.5 (as available in Debian 10) use the slow python backend by default instead of the most efficient one available like modern ijson versions, significantly slowing down cve checking. E.G.: time ./support/scripts/pkg-stats --nvd-path ~/.nvd -p avahi --html foobar.html Goes from 174,44s user 2,11s system 99% cpu 2:58,04 total To 93,53s user 2,00s system 98% cpu 1:36,65 total E.G. almost 2x as fast. As a workaround, detect when the python backend is used and try to use a more efficient one instead. Use the yajl2_cffi backend as recommended by upstream, as it is most likely to work, and print a warning (and continue) if we fail to load it. The detection is slightly complicated by the fact that ijson.backends used to be a reference to a backend module, but is nowadays a string (without the ijson.backends prefix). Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>