[Haskell-cafe] Aeson memory use

Lana Black lanablack at amok.cc
Wed Aug 8 19:54:07 UTC 2018

Hello Cafe,

Recently while trying to optimize some code, I noticed that aeson 
requires quite a substantial amount of memory when parsing map-like 
structures. The quick example I crafted [1] is quite surprising. In 
order to parse an 11 megabyte file aeson requires around 300 megabytes 
of memory (according to the heap profiler), and the total memory 
footprint (according to htop) jumps to around 700 megabytes.

Is there a way to reduce this number to something less insane? I suspect 
that I might be doing something wrong here, but I can't exactly see what.

[1] https://github.com/greydot/aeson-example

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