perf: only format model values if writing text model

VowpalWabbit / vowpal_wabbit

Vowpal Wabbit is a machine learning system which pushes the frontier of machine learning with techniques such as online, hashing, allreduce, reductions, learning2search, active, and interactive learning.

https://vowpalwabbit.org

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perf: only format model values if writing text model #4613

Closed jackgerrits closed 1 year ago

jackgerrits commented 1 year ago

In my testing adding this fix reduced model saving time from 9.11s to 2.08s for a 190MB model.