Not sure how useful this is, but seeing that there are some performance-related commits in GitHub lately, I compared the two filters by simply copying each if the two lists below 20,000 times in a tiddler. all[current] is almost double the speed of <currentTiddler>, 1min 15sec vs. 2 min 20 sec on my Core-i7. There is probably some datatype conversion happening with the latter.
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