To Pool or Not To Pool? Revisiting an Old Pattern

Ioannis T. Christou; Sofoklis Efremidis

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arXiv · 1801.03763

To Pool or Not To Pool? Revisiting an Old Pattern

Ioannis T. Christou·Sofoklis Efremidis

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Abstract

We revisit the well-known object-pool design pattern in Java. In the last decade, the pattern has attracted a lot of criticism regarding its validity when used for light-weight objects that are only meant to hold memory rather than any other resources (database connections, sockets etc.) and in fact, common opinion holds that is an anti-pattern in such cases. Nevertheless, we show through several experiments in different systems that the use of this pattern for extremely short-lived and light-weight memory objects can in fact significantly reduce the response time of high-performance multi-threaded applications, especially in memory-constrained environments. In certain multi-threaded applications where high performance is a requirement and/or memory constraints exist, we recommend therefore that the object pool pattern be given consideration and tested for possible run-time as well as memory footprint improvements.

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Ioannis T. Christou, Sofoklis Efremidis. 2018-01-10. To Pool or Not To Pool? Revisiting an Old Pattern. https://arxiv.org/abs/1801.03763

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