HashMap/ConcurrentHashMap Performance Comparison

gistfile1.txt

Testing HashMap with 100 objects...
  .containsKey() - 6418 ns / 0.006418 ms
  .get() - 10793 ns / 0.010793 ms
  .put() - 9043 ns / 0.009043 ms
  .remove() - 8751 ns / 0.008751 ms
Testing ConcurrentHashMap with 100 objects...
  .containsKey() - 2625 ns / 0.002625 ms
  .get() - 2334 ns / 0.002334 ms
  .put() - 4667 ns / 0.004667 ms
  .remove() - 15460 ns / 0.015460 ms
-------------------------------------------
Testing HashMap with 500 objects...
  .containsKey() - 2042 ns / 0.002042 ms
  .get() - 2042 ns / 0.002042 ms
  .put() - 2334 ns / 0.002334 ms
  .remove() - 2626 ns / 0.002626 ms
Testing ConcurrentHashMap with 500 objects...
  .containsKey() - 2042 ns / 0.002042 ms
  .get() - 2334 ns / 0.002334 ms
  .put() - 4376 ns / 0.004376 ms
  .remove() - 4376 ns / 0.004376 ms
-------------------------------------------
Testing HashMap with 1000 objects...
  .containsKey() - 1751 ns / 0.001751 ms
  .get() - 1751 ns / 0.001751 ms
  .put() - 2042 ns / 0.002042 ms
  .remove() - 2042 ns / 0.002042 ms
Testing ConcurrentHashMap with 1000 objects...
  .containsKey() - 2042 ns / 0.002042 ms
  .get() - 2042 ns / 0.002042 ms
  .put() - 4959 ns / 0.004959 ms
  .remove() - 4376 ns / 0.004376 ms
-------------------------------------------
Testing HashMap with 5000 objects...
  .containsKey() - 2042 ns / 0.002042 ms
  .get() - 2626 ns / 0.002626 ms
  .put() - 1751 ns / 0.001751 ms
  .remove() - 2334 ns / 0.002334 ms
Testing ConcurrentHashMap with 5000 objects...
  .containsKey() - 2918 ns / 0.002918 ms
  .get() - 2334 ns / 0.002334 ms
  .put() - 4668 ns / 0.004668 ms
  .remove() - 4667 ns / 0.004667 ms
-------------------------------------------
Testing HashMap with 10000 objects...
  .containsKey() - 2333 ns / 0.002333 ms
  .get() - 1750 ns / 0.001750 ms
  .put() - 583 ns / 0.000583 ms
  .remove() - 2042 ns / 0.002042 ms
Testing ConcurrentHashMap with 10000 objects...
  .containsKey() - 2625 ns / 0.002625 ms
  .get() - 1750 ns / 0.001750 ms
  .put() - 583 ns / 0.000583 ms
  .remove() - 9918 ns / 0.009918 ms
-------------------------------------------
Testing HashMap with 100000 objects...
  .containsKey() - 4667 ns / 0.004667 ms
  .get() - 2042 ns / 0.002042 ms
  .put() - 875 ns / 0.000875 ms
  .remove() - 2334 ns / 0.002334 ms
Testing ConcurrentHashMap with 100000 objects...
  .containsKey() - 6709 ns / 0.006709 ms
  .get() - 2625 ns / 0.002625 ms
  .put() - 1166 ns / 0.001166 ms
  .remove() - 8752 ns / 0.008752 ms
-------------------------------------------
Testing HashMap with 1000000 objects...
  .containsKey() - 5543 ns / 0.005543 ms
  .get() - 2041 ns / 0.002041 ms
  .put() - 875 ns / 0.000875 ms
  .remove() - 2626 ns / 0.002626 ms
Testing ConcurrentHashMap with 1000000 objects...
  .containsKey() - 6709 ns / 0.006709 ms
  .get() - 2333 ns / 0.002333 ms
  .put() - 1167 ns / 0.001167 ms
  .remove() - 8751 ns / 0.008751 ms
-------------------------------------------