revset: mark spots that should use 'smartset.min()' Using smartset's min will be significantly faster when the input set can provided an optimised answer. I do not have time to fix all of them but I'm marking the spot.

revset: mark the place where we are combining sets in the wrong direction We should always combine with subset as the left operand (to preserve the order). I do not have time to fix all of them so I'm just marking the spot.

revset: point out wrong behavior in fullreposet I cannot fix all issues in revset because I've got other things to do, but let's write down all the brokenness to help other people reading and fixing.

revsetbenchmarks: also display tag when printing a revision This is usually more useful information than the commit message.

revsetbenchmarks: clean up revsets that achieved with default variants We remove revset making use of min and max as this is covered by the variants. We could use variant for roots too, but it is not in the default so keep it here.

revsetbenchmarks: use combination variants in default set Now that we have them, let's make use of them.

revsetbenchmarks: support combining variants with "+" We need more advanced variants in some cases. For example, "The last rev of the sorted version". We introduce a syntax for this: `reverse+last` means `last(reverse(REVSET))`.

revsetbenchmarks: use many more variants by default So far the variants feature was introduced, but not used by default. We now use a set of basic variants by default.

revsetbenchmarks: display even more compact timing result We now use an 8 char display for timing (from 10), we add some logic to drop precision if the number grows too large (as we do not care about sub-0 digit in this case). This allow to pack more variants in a single screen.

revsetbenchmarks: allow running multiple variants per revset The current benchmarks were only testing the whole iteration. This is suboptimal because some changes are meaningful for things like first result, minimum or sorting. We introduce a "variants" feature that let you systematically add some variants to all revsets tested. A typical variants value would be 'plain,min,last,sort'. When testing 'all()' it will also provide testing for: - all() - min(all()) - last(all()) - sort(sort) and output: plain min last sort 0) 0.034568 0.037857 0.000074 0.034238 1) 0.011358 32% 0.020181 53% 0.000080 108% 0.011405 33% Using revsets (who hit the API) instead of the internal API add some overhead, but the overhead should be the same everywhere so it still allow comparison. This is is more simple to implement and allows comparison with older versions who do not have the same API.