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Transform ArrayList to LinkedList for Performance Improvement #1445

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FastAtlas opened this issue Sep 3, 2021 · 0 comments
Open

Transform ArrayList to LinkedList for Performance Improvement #1445

FastAtlas opened this issue Sep 3, 2021 · 0 comments
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type: feature request ‘Nice-to-have’ improvement, new feature or different behavior or design.

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@FastAtlas
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Hi,
We find that there are several ArrayList objects which are not manipulated by random access. Due to the memory reallocation triggered in the successive insertions, the time complexity of add method of ArrayList is amortized O(1). We notice that these objects are only used for traversal and the retrieval for the first or the last element.

This functionality can be implemented by LinkedList. Moreover, the insertion of LinkedList is strictly O(1) time complexity because no memory reallocation occurs.

We discovered this inefficient usage of containers by our tool Ditto. The patch is submitted in #1444. Could you please check and accept it? We have tested the patch on our PC. The patched program works well.

Bests

Ditto
@Neenu1995 Neenu1995 added the type: feature request ‘Nice-to-have’ improvement, new feature or different behavior or design. label Sep 8, 2021
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@Neenu1995 @FastAtlas