dwarf-assembly/benching/gzip/EVALUATION.md

gzip - evaluation

Artifacts saved in evaluation_artifacts.

Performance

Using the command line

for i in $(seq 1 100); do
  perf report 2>&1 >/dev/null | tail -n 1 \
    | python ../hackbench/to_report_fmt.py \
    | sed 's/^.* & .* & \([0-9]*\) & .*$/\1/g'
done

we save a sequence of 100 performance readings to some file.

Samples:

• eh_elf: 331134 unw/exec
• vanilla: 331144 unw/exec

Average time/unw:

• eh_elf: 83 ns
• vanilla: 1304 ns

Standard deviation:

• eh_elf: 2 ns
• vanilla: 24 ns

Average ratio: 15.7 Ratio uncertainty: 0.8

Distibution of unw_step issues

eh_elf case

• success: 331134 (99.9%)
• fallback to DWARF: 2 (0.0%)
• fallback to libunwind heuristics: 8 (0.0%)
• fail to unwind: 379 (0.1%)
• total: 331523

vanilla case

• success: 331136 (99.9%)
• fallback to libunwind heuristics: 8 (0.0%)
• fail to unwind: 379 (0.1%)
• total: 331523