findrenames: speedup exact match benchmarked on crew repo with: rm -rf * ; hg up -C ; for i in `find . -name "*.py"` ; do mv $i $i.new;done followed by: hg addremove -s 100 before: Time: real 28.890 secs (user 26.920+0.000 sys 1.450+0.000) after : Time: real 6.790 secs (user 5.310+0.000 sys 1.350+0.000)