Step 1 : Are the Scala programs faster? At a glance.
This chart shows 3 comparisons - Time-used, Memory-used and Code-used.
Each chart bar shows, for one unidentified benchmark, how much the fastest Scala program used compared to the fastest Java 6 -server program.
Step 2 : Are the Scala programs faster? Approximately.
This table shows 3 comparisons - Time-used, Memory-used and Code-used.
Each table row shows, for one named benchmark, how much the fastest Scala program used compared to the fastest Java 6 -server program.
| Scala used what fraction? used how many times more? | ||||
|---|---|---|---|---|
| Benchmark | Time | Memory | Code | Reduced N |
| reverse-complement | 1/2 | ± | ± | |
| binary-trees | ± | ± | ± | |
| partial-sums | ± | ± | ± | |
| nsieve-bits | ± | ± | ± | |
| nsieve | ± | 10× | ± | |
| spectral-norm | ± | ± | ± | |
| n-body | ± | ± | ± | |
| mandelbrot | ± | ± | ± | |
| k-nucleotide | ± | ± | ± | |
| fasta | ± | ± | ± | |
| recursive | ± | ± | ± | 7 |
| fannkuch | ± | 2× | 1/2 | |
| sum-file | 2× | ± | ± | |
| regex-dna | 3× | ± | ± | |
| pidigits | 14× | 3× | 1/2 | |
± read the measurements and then read the program source code.
Step 3 : Are the Scala programs faster? Measurements.
This table shows 5 measurements - CPU Time, Elapsed Time, Memory, Code and ~ CPU Load.
For each named benchmark, measurements of the fastest Scala program are shown for comparison against measurements of the fastest Java 6 -server program.
| Program Source Code | CPU secs | Elapsed secs | Memory KB | Code B | ~ CPU Load |
|---|---|---|---|---|---|
| reverse-complement | |||||
| Scala | 2.29 | 32,484 | 1086 | ||
| Java 6 -server | 3.64 | 46,700 | 863 | ||
| binary-trees | |||||
| Scala | 6.44 | 31,756 | 536 | ||
| Java 6 -server | 7.56 | 24,012 | 603 | ||
| partial-sums | |||||
| Scala | 5.97 | 14,084 | 493 | ||
| Java 6 -server | 6.85 | 9,460 | 470 | ||
| nsieve-bits | |||||
| Scala | 4.50 | 15,892 | 390 | ||
| Java 6 -server | 5.13 | 12,204 | 517 | ||
| nsieve | |||||
| Scala | 3.99 | 200,428 | 392 | ||
| Java 6 -server | 4.03 | 19,824 | 452 | ||
| spectral-norm | |||||
| Scala | 27.27 | 28,312 | 464 | ||
| Java 6 -server | 27.15 | 26,424 | 514 | ||
| n-body | |||||
| Scala | 28.51 | 15,476 | 1430 | ||
| Java 6 -server | 27.54 | 10,888 | 1430 | ||
| mandelbrot | |||||
| Scala | 7.07 | 12,032 | 454 | ||
| Java 6 -server | 6.62 | 9,984 | 623 | ||
| k-nucleotide | |||||
| Scala | 18.33 | 50,332 | 1046 | ||
| Java 6 -server | 15.75 | 66,540 | 1052 | ||
| fasta | |||||
| Scala | 23.59 | 12,268 | 1207 | ||
| Java 6 -server | 19.96 | 10,096 | 1240 | ||
| recursive N = 7 reduced workload | |||||
| Scala | 0.84 | 13,220 | 420 | ||
| Java 6 -server | 0.68 | 9,652 | 427 | ||
| fannkuch | |||||
| Scala | 15.46 | 14,852 | 473 | ||
| Java 6 -server | 11.79 | 9,888 | 761 | ||
| sum-file | |||||
| Scala | 9.32 | 28,388 | 172 | ||
| Java 6 -server | 4.78 | 22,872 | 222 | ||
| regex-dna | |||||
| Scala | 12.85 | 76,960 | 663 | ||
| Java 6 -server | 4.06 | 52,248 | 711 | ||
| pidigits | |||||
| Scala | 45.10 | 29,796 | 461 | ||
| Java 6 -server | 3.31 | 11,728 | 938 | ||
| chameneos-redux | |||||
| Scala | |||||
Measurements for all the accepted programs
Scala : higher-order type-safe programming for jvm
Online book: Programming in Scala pdf
A Scala Tutorial for Java programmers pdf
Home Page: http://scala.epfl.ch/
Download: http://scala.epfl.ch/downloads/index.html