The attached patch simplifies and speeds up the RangedIterator.
The benchmarks were run using the following function to test vector iteration:
`
(defn consume-iterator
[v]
(let [iter (-iterator v)]
(loop []
(when (.hasNext iter)
(.next iter)
(recur)))))
`
A series of "simple-benchmarks" were setup as follows:
(simple-benchmark [v (into [] (range N))] (consume-iterator v) I)
Where 'N' and 'I' were values from the 'Vector Size' and 'Iterations' columns of the table below .
|Vector Size|Iterations|V8 Speed (link: msec) (master)|V8 Speed (link: msec) (patch)|JSC Speed (link: msec) (master)| JSC Speed (link: msec) (patch)|
| :-- | :-- | :-- | :-- | :-- | :-- | :-- |
|1|100,000|15|11|13|7|
|2|100,000|14|10|7|4|
|4|100,000|18|10|9|5|
|8|100,000|27|12|14|6|
|16|100,000|43|17|19|9|
|32|100,000|74|24|37|15|
|100|100,000|217|59|105|45|
|1000|100,000|2008|524|1032|392|
|10,000|100,000|20390|5856|10249|4178|
|100,000|10,000|20334|5324|10324|4387|
Javascript engine versions used:
V8 version 5.1.281.47
JSC version Unknown
The RangedIterator constructor function ranged-iterator was also made private.
