package: linux-perf-4.18 version: 4.18.6-1~bpo9+1 Package is not linked with libunwind, which makes perf report very slow when dwarf graph is used.
How to reproduce: $ sudo perf_4.18 record -F 200 -p 38429 --call-graph dwarf sleep 120 $ time sudo perf report -G --no-inline > /dev/null real 5m18.259s user 5m10.644s sys 0m7.527s I managed to rebuild linux-perf-4.18 manually with libunwind. Using the exact same set of samples, this is how it performs: $ time sudo perf_4.18 report -G --no-inline > /dev/null real 0m0.846s user 0m0.654s sys 0m0.190s I confirmed the followings: - linux-perf-4.9 is linked with libunwind and performs properly - linux-perf-* packages in sid/experimental are also linked with libunwind - linux-perf-* (>4.9) in Stretch backports are not linked with libunwind and they perform poorly I suggest to rebuild all linux-perf packages in Stretch backports with libunwind linked. -- Szabolcs Fazekas Ahrefs
