Stream.toList vs Collectors.toList: Which Java List Conversion Is Faster?

This article compares Java's Stream.toList(), Collectors.toList(), and Collectors.toUnmodifiableList() by explaining their differences, showing benchmark code, presenting performance results for both 1,000 and 10,000 element streams, and concluding which method offers superior speed and efficiency.

BenchmarkCollectorsStream

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Stream.toList vs Collectors.toList: Which Java List Conversion Is Faster?

Programmer DD

May 22, 2022 · Backend Development

Why Java Stream.toList() Differs from Collectors.toList() and How to Use Them

This article explains the difference between Java's Stream.toList() introduced in Java 16, which returns an unmodifiable list, and the traditional Collectors.toList() used in Java 8 that produces a mutable list, and shows how to achieve immutability across versions.

CollectorsImmutable ListJava

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Why Java Stream.toList() Differs from Collectors.toList() and How to Use Them