@SethTisue I did some benchmarks locally. There is the source code that I did the benchmark.

Environment:

CPU: E3-1231 v3 without hyper-threading and turbo boost
RAM: 16G, I allocated 8G for each benchmark.
OS: Debian 8 with limitation(2.5GHz) of CPU frequency.
JVM: Oracle 1.8.0_144-b01
Scala: 2.12.3

Result:

[info] MapBench.map           120000       N/A  thrpt   45    91.299 ±   1.214  ops/s
[info] MapBench.map            15000       N/A  thrpt   45   702.102 ±   1.874  ops/s
[info] ParMapBench.map        120000         1  thrpt   45    98.208 ±   0.464  ops/s
[info] ParMapBench.map        120000         2  thrpt   45   188.050 ±   1.217  ops/s
[info] ParMapBench.map        120000         4  thrpt   45   287.804 ±   2.439  ops/s
[info] ParMapBench.map         15000         1  thrpt   45   872.125 ±   2.228  ops/s
[info] ParMapBench.map         15000         2  thrpt   45  1578.931 ±   8.447  ops/s
[info] ParMapBench.map         15000         4  thrpt   45  2556.409 ±  14.718  ops/s
[info] ParVectorBench.reduce  250000         1  thrpt   45   582.542 ±  12.397  ops/s
[info] ParVectorBench.reduce  250000         2  thrpt   45   655.938 ±  12.524  ops/s
[info] ParVectorBench.reduce  250000         4  thrpt   45   927.864 ±   7.750  ops/s
[info] ParVectorBench.reduce  120000         1  thrpt   45   944.875 ± 137.443  ops/s
[info] ParVectorBench.reduce  120000         2  thrpt   45  1481.952 ±  34.182  ops/s
[info] ParVectorBench.reduce  120000         4  thrpt   45  2468.674 ±  42.307  ops/s
[info] VectorBench.reduce     250000       N/A  thrpt   45   495.297 ±   1.650  ops/s
[info] VectorBench.reduce     120000       N/A  thrpt   45  1116.625 ±   2.346  ops/s

Do you have any suggestion with this benchmark? Mybe I could change to different size or add bigger size of collection for the benchamrk? Thanks! :)

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