GraalTesting

graalTesting.txt

-rw-rw-r--  1 sergej sergej  75191424 Jan 13 02:16 big2.txt (Luther Bible)
Linux sergej-P50 4.18.0-13-generic #14-Ubuntu SMP Wed Dec 5 09:04:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
// Graal-1.0.0-RC10 OpenJDK

sergej@sergej-P50:~/Downloads$ lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              8
On-line CPU(s) list: 0-7
Thread(s) per core:  2
Core(s) per socket:  4
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               94
Model name:          Intel(R) Xeon(R) CPU E3-1535M v5 @ 2.90GHz
Stepping:            3
CPU MHz:             1924.569
CPU max MHz:         3800,0000
CPU min MHz:         800,0000
BogoMIPS:            5808.00
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            8192K
NUMA node0 CPU(s):   0-7


---


sergej@sergej-P50:~/Development/GitHub/GraalVMTest/oracleIssue/src/main/java$ /usr/bin/time -v /home/sergej/.gradle/caches/com.palantir.graal/1.0.0-rc10/graalvm-ce-1.0.0-rc10/bin/java TopTen ~/Downloads/big2.txt 
und = 742224
der = 300752
die = 265888
da = 215936
zu = 161360
sie = 157024
den = 140000
er = 139776
das = 139760
ich = 129824
        Command being timed: "/home/sergej/.gradle/caches/com.palantir.graal/1.0.0-rc10/graalvm-ce-1.0.0-rc10/bin/java TopTen /home/sergej/Downloads/big2.txt"
        User time (seconds): 16.56
        System time (seconds): 0.46
        Percent of CPU this job got: 160%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:10.61
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 1339556
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 333170
        Voluntary context switches: 5955
        Involuntary context switches: 63
        Swaps: 0
        File system inputs: 0
        File system outputs: 64
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0
        
// native-image   
sergej@sergej-P50:~/Development/GitHub/GraalVMTest/oracleIssue/src/main/java$ /usr/bin/time -v ~/Development/GitHub/GraalVMTest/oracleIssue/build/graal/hello-world ~/Downloads/big2.txt 
und = 742224
der = 300752
die = 265888
da = 215936
zu = 161360
sie = 157024
den = 140000
er = 139776
das = 139760
ich = 129824
        Command being timed: "/home/sergej/Development/GitHub/GraalVMTest/oracleIssue/build/graal/hello-world /home/sergej/Downloads/big2.txt"
        User time (seconds): 23.04
        System time (seconds): 0.11
        Percent of CPU this job got: 99%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:23.16
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 277928
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 67705
        Voluntary context switches: 1
        Involuntary context switches: 101
        Swaps: 0
        File system inputs: 0
        File system outputs: 0
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0

Interesting: real/user time on native image identical, on java RC10 not so. Also CPU is 160% on java and on native image nearly 100%. 
It does not make sense, that RC-10 java has less real, than user-time, expect there is some concurrency going on.

---

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class TopTen {

  public static void main(String[] args) {
    Arrays.stream(args)
        .flatMap(TopTen::fileLines)
        .flatMap(line -> Arrays.stream(line.split("\\b")))
        .map(word -> word.replaceAll("[^a-zA-Z]", ""))
        .filter(word -> word.length() > 0)
        .map(String::toLowerCase)
        .collect(Collectors.groupingBy(Function.identity(), Collectors.counting()))
        .entrySet()
        .stream()
        .sorted((a, b) -> -a.getValue().compareTo(b.getValue()))
        .limit(10)
        .forEach(e -> System.out.format("%s = %d%n", e.getKey(), e.getValue()));
  }

  private static Stream<String> fileLines(String path) {
    try {
      return Files.lines(Paths.get(path));
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
}