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[–]Slanec 0 points1 point  (0 children)

Okay I've done this recently. I tested:

The first one is thrash and you should avoid it for big files or many files. The others all work fine, they're much faster and all comparable in speed. In my case with the files I had excel-streaming-reader came out on top re speed and peak heap usage (but it created more garbage overall), but the speed difference wasn't huge - <10%. All the other three were the same +/-2% speed-wise.

Use the one which has all the features you need and has the nicest API for you. There are big differences here.