Performance improvement for operf's perf_event-to-oprofile format conversion
This patch decreases the time needed for converting sample records from
perf_events format to oprofile sample file format by about 1/3. The
performance improvement is most notable when doing system-wide profiling
of a busy system and specifying '--lazy-conversion', where the conversion
process runs after a (long) profiling session has been ended.
Signed-off-by: Maynard Johnson <firstname.lastname@example.org>