fastjson [question] Does FastJson use reflection ?

ufj5ltwl 于 2021-11-27 发布在 Java

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I was wondering if FastJson use reflection in its implementation ?
I am considering between FastJson and Kotlinx Serializer for my project, since I know that Kotlinx Serializer doesn't use reflection in its implementation therefore it doesn't suffer from reflection performance overhead https://blog.frankel.ch/performance-cost-of-reflection/.

fastjson

来源：https://github.com/alibaba/fastjson/issues/2946

3条答案

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xsuvu9jc1#

In filedBase mode, only reflection will be used.

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ewm0tg9j2#

By default, fastjson uses ASM(a technique that dynamically generates/modifies .class bytecode files directly) instead of reflection, which can be toggled by using the annotation @JSONType(asm = true/false).

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xam8gpfp3#

ASM default，and Reflection optional.

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