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The cited article also shows benchmarks from 2017 in which Jackson parser was out performing GSON in the large file category. We can surmise that there is a constant battle between these objectMappers and Jackson may begin out performing GSON again in the future. For example this article from 2019 with new benchmarks states that the difference between the different mappers is negligible, with Jackson mapper having a slight lead with larger files.

Resolution

It would make the most sense to use GSON as much as possible as it is the faster than Jackson. However the practicality of Jacksons parsing cannot be overlooked. Therefore it would make sense to use the Jackson parser in this scenario. We also don't want to have or create a Jackson mapper and GSON mapper object in the same file however as the memory cost is quite high.

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