view .hgtags @ 25343:7fbef7932af9

revset: optimize 'or' operation of trivial revisions to a list

As seen in issue4565 and issue4624, GUI wrappers and automated scripts are
likely to generate a long query that just has numeric revisions joined by 'or'.
One reason why is that they allows users to choose arbitrary revisions from
a list. Because this use case isn't handled well by smartset, let's optimize
it to a plain old list.

Benchmarks:

1) reduce nesting of chained 'or' operations
2) optimize to a list (this patch)

revset #0: 0 + 1 + 2 + ... + 1000
1) wall 0.483341 comb 0.480000 user 0.480000 sys 0.000000 (best of 20)
2) wall 0.025393 comb 0.020000 user 0.020000 sys 0.000000 (best of 107)

revset #1: sort(0 + 1 + 2 + ... + 1000)
1) wall 0.035240 comb 0.040000 user 0.040000 sys 0.000000 (best of 100)
2) wall 0.026432 comb 0.030000 user 0.030000 sys 0.000000 (best of 102)

revset #2: first(0 + 1 + 2 + ... + 1000)
1) wall 0.028949 comb 0.030000 user 0.030000 sys 0.000000 (best of 100)
2) wall 0.025503 comb 0.030000 user 0.030000 sys 0.000000 (best of 106)

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