Java versus Java OpenJ9 fastest performance Always look at the source code. If the fastest programs are hand-written vector instructions, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code. fannkuch-redux source secs mem gz cpu secs Java #3 40.76 42,844 1264 40.83 Java 10.98 42,812 1289 43.36 Java OpenJ9 #3 43.37 56,492 1264 43.70 Java #2 44.03 40,916 520 44.09 Java OpenJ9 11.99 56,792 1289 46.96 Java OpenJ9 #2 58.77 58,444 520 59.03 n-body source secs mem gz cpu secs Java #5 6.78 41,384 1435 6.82 Java #4 6.87 41,188 1495 6.91 Java #2 7.42 41,308 1430 7.46 Java #3 7.47 41,256 1436 7.51 Java 7.85 41,512 1437 7.89 Java OpenJ9 #4 10.48 70,480 1495 10.65 Java OpenJ9 #2 10.96 70,568 1430 11.14 Java OpenJ9 #3 11.00 70,516 1436 11.19 Java OpenJ9 11.50 70,724 1437 11.75 Java OpenJ9 #5 11.68 70,596 1435 11.87 spectral-norm source secs mem gz cpu secs Java #3 1.66 42,924 762 6.21 Java OpenJ9 #2 1.90 59,300 956 6.82 Java 7.07 42,268 521 7.13 Java OpenJ9 #3 2.33 61,220 762 8.47 Java #2 2.40 42,164 956 9.25 Java OpenJ9 10.44 59,612 521 10.67 mandelbrot source secs mem gz cpu secs Java #4 4.45 104,488 667 16.20 Java #2 4.13 83,152 802 16.22 Java #6 4.28 83,056 808 16.84 Java OpenJ9 #6 5.31 125,604 808 20.46 Java OpenJ9 #4 6.37 119,320 667 23.18 Java OpenJ9 #2 6.03 123,864 802 23.37 Java 25.70 41,388 671 25.76 Java OpenJ9 26.74 71,556 671 26.92 Java OpenJ9 #3 7.86 118,680 910 30.59 Java #3 7.86 83,424 910 30.96 pidigits source secs mem gz cpu secs Java #3 0.93 40,860 770 0.96 Java OpenJ9 #3 1.10 66,072 770 1.16 Java #2 1.34 44,524 944 1.42 Java OpenJ9 #2 1.52 57,796 944 1.60 Java 7.61 486,236 807 8.69 Java OpenJ9 11.18 79,768 807 12.19 regex-redux source secs mem gz cpu secs Java 8.38 666,804 875 16.42 Java #3 5.17 671,372 935 17.04 Java #6 5.57 1,234,928 746 17.17 Java OpenJ9 #3 9.53 444,804 935 26.43 Java OpenJ9 #6 9.58 509,172 746 26.61 Java OpenJ9 14.72 434,608 875 26.69 fasta source secs mem gz cpu secs Java #4 3.15 42,784 1528 3.26 Java OpenJ9 #4 3.48 57,296 1528 3.63 Java #6 1.18 48,408 2549 3.71 Java #5 1.24 48,752 2478 3.81 Java #2 4.35 47,184 1259 4.50 Java OpenJ9 #5 1.51 60,228 2478 4.56 Java OpenJ9 #6 1.54 64,044 2549 4.74 Java OpenJ9 #2 5.26 59,504 1259 5.47 k-nucleotide source secs mem gz cpu secs Java 5.01 368,104 1821 16.33 Java #6 7.18 365,592 1614 25.01 Java #3 7.30 365,348 1642 25.39 Java OpenJ9 23.40 347,884 1821 34.43 Java #4 34.43 195,584 1887 34.79 Java #5 16.05 219,872 2225 38.17 Java OpenJ9 #4 46.84 219,512 1887 47.66 Java OpenJ9 #3 29.71 400,512 1642 55.77 Java OpenJ9 #5 24.06 227,040 2225 57.98 Java OpenJ9 #6 30.33 360,496 1614 58.05 reverse-complement source secs mem gz cpu secs Java #6 3.33 2,031,460 760 3.96 Java #5 4.73 1,096,344 1115 4.86 Java #4 5.57 1,889,928 656 5.68 Java #7 23.06 1,036,296 1654 6.31 Java OpenJ9 #6 6.07 2,057,936 760 7.24 Java OpenJ9 #4 7.20 1,932,752 656 7.64 Java OpenJ9 #5 7.87 1,130,712 1115 8.39 Java OpenJ9 #7 167.82 1,065,824 1654 301.21 Java OpenJ9 #8 Bad Output Java OpenJ9 #3 Bad Output Java #3 Bad Output Java #8 Bad Output binary-trees source secs mem gz cpu secs Java OpenJ9 #3 3.96 976,816 546 5.10 Java #4 4.50 2,081,744 846 5.22 Java #3 4.80 2,076,860 546 5.59 Java #6 4.84 2,097,072 535 5.60 Java #2 4.93 2,067,656 558 5.67 Java OpenJ9 #4 5.44 687,152 846 7.95 Java #7 2.57 1,728,452 841 8.00 Java OpenJ9 #2 5.51 637,908 558 8.32 Java OpenJ9 #7 2.57 1,155,604 841 8.33 Java OpenJ9 #6 5.70 615,380 535 8.64 Java java 22 2024-03-19 Java HotSpot(TM) 64-Bit Server VM (build 22+36-2370, mixed mode, sharing) Java OpenJ9 javac 21.0.2 all Java programs & measurements all Java OpenJ9 programs & measurements