Hello,

I found an issue int timechart backtrace handling during the last review.
The goal is to reduce unnecessary work in generating backtrace string.

Thanks,
Namhyung


Namhyung Kim (4):
  perf timechart: Don't pass @event to cat_backtrace()
  perf timechart: Generate backtrace only if needed
  perf timechart: Remove unused backtrace in trace_handler
  perf timechart: Remove unnecessary copy of backtrace

 tools/perf/builtin-timechart.c | 88 ++++++++++++++--------------------
 1 file changed, 36 insertions(+), 52 deletions(-)

-- 
2.54.0.1032.g2f8565e1d1-goog