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// Copyright 2007 The Android Open Source Project
/**
* Array write speed test.
*/
public class Main {
/** whether to report times */
static boolean timing = false;
static final int STORAGE_SIZE = 128*1024;
static int[] mStorage = new int[STORAGE_SIZE];
static public void report(long start, long end) {
if (! timing) {
return;
}
System.out.println("Finished in " + ((end - start) / 1000000.0)
+ " msec");
}
static void writeArray(int val) {
for (int i = STORAGE_SIZE-1; i >= 0; i--)
mStorage[i] = val;
}
static void writeTest() {
long start, end;
writeArray(0); // touch all the memory
System.out.println("Running writeTest...");
start = System.nanoTime();
for (int i = 1; i < 20; i++)
writeArray(i);
end = System.nanoTime();
report(start, end);
}
static void copyTest() {
long start, end;
// touch once
System.arraycopy(mStorage, 0, mStorage,
STORAGE_SIZE/2, STORAGE_SIZE/2);
System.out.println("Running copyTest...");
start = System.nanoTime();
for (int i = 1; i < 35; i++) {
System.arraycopy(mStorage, 0, mStorage,
STORAGE_SIZE/2, STORAGE_SIZE/2);
}
end = System.nanoTime();
report(start, end);
}
public static void main(String[] args) {
if ((args.length >= 1) && args[0].equals("--timing")) {
timing = true;
}
writeTest();
copyTest();
System.out.println("Done!");
}
}
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