I'm not sure that's an apt description either. Haxl's features include auto batching of IO through parallelism and a temporal cache...for error logging when fai

I'm not sure that's an apt description either. Haxl's features include auto batching of IO through parallelism and a temporal cache...for error logging when failures occur. It's spelled out in the first minute he talks about it. In the IO batching code (the boilerplate) you specify how and what to output in your logging. Haxl can be used without performing optimization (write an inefficient batcher) or doing data retrieval (the I/O is fire and forget and never cache anything). Maybe I am misunderstanding the basic usage.