cp big1.txt big4.txt cp big2.txt big5.txt cp big3.txt big6.txt cp big1.txt big7.txt cp big2.txt big8.txt cp big3.txt big9.txt cp big1.txt biga.txt cp big2.txt bigb.txt cp big3.txt bigc.txt cp big1.txt bigd.txt cp big2.txt bige.txt cp big3.txt bigf.txt cp big1.txt bigg.txt cp big2.txt bigh.txt cp big3.txt bigi.txt cp big1.txt bigj.txt cp big2.txt bigk.txt cp big3.txt bigl.txt cp big1.txt bigm.txt cp big2.txt bign.txt cp big3.txt bigo.txt cp big1.txt bigp.txt cp big2.txt bigq.txt cp big3.txt bigr.txt cp big1.txt bigs.txt cp big2.txt bigt.txt cp big3.txt bigu.txt #### $ g++ -o llil4vec-omp -std=c++20 -fopenmp -Wall -O3 llil4vec.cpp -I./fast_io/include $ time OMP_NUM_THREADS=30 ./llil4vec-omp big?.txt >out.txt llil4vec (fixed string length=6) start use OpenMP get properties time : 0.937948 secs sort properties time : 0.494592 secs emplace set sort time : 1.02668 secs write stdout time : 0.50569 secs total time : 2.96497 secs real 0m3.271s <-- total wall time, performs similarly user 0m16.823s <-- nothing unusual, fans seem quiet sys 0m4.188s #### $ clang++ -o llil4vec-omp -std=c++20 -fopenmp -Wall -O3 llil4vec.cpp -I./fast_io/include $ time OMP_NUM_THREADS=30 ./llil4vec-omp big?.txt >out.txt llil4vec (fixed string length=6) start use OpenMP get properties time : 1.07873 secs sort properties time : 0.717261 secs emplace set sort time : 0.606499 secs write stdout time : 0.437287 secs total time : 2.83984 secs real 0m3.201s <-- total wall time, performs similarly user 0m45.889s <-- system fans noticeably louder sys 0m5.934s #### $ time ~/j904/bin/jconsole llil4_p.ijs big?.txt out.txt Read and parse input: 2.43996 Classify, sum, sort: 4.63914 Format and write output: 0.848965 Total time: 7.92807 real 0m7.934s <-- total wall time user 0m24.782s <-- this too, system fans roaring sys 0m26.764s <-- because user and sys combined