tags-cache: skip the filternode step if we are not going to use it When warming the hgtagsfnodescache, we don't need the actual result, so we can simply skip the part that "filter" fnode we read from the cache. So provide a quite visible speed up to the top level `hg debugupdatecache` function. ### data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog # benchmark.name = hg.debug.debug-update-cache # bin-env-vars.hg.flavor = default # bin-env-vars.hg.py-re2-module = default # benchmark.variants.pre-state = warm before: 19.947581 after: 18.916804 (-5.17%, -1.03)

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  $ hg init repo

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  $ cd repo

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  $ touch a

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  $ unset HGUSER

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  $ echo "[ui]" >> .hg/hgrc

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  $ echo "username= foo" >> .hg/hgrc

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  $ echo "          bar1" >> .hg/hgrc

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  $ hg ci -Am m

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  adding a

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  abort: username 'foo\nbar1' contains a newline

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  [255]

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  $ rm .hg/hgrc

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  $ HGUSER=`(echo foo; echo bar2)` hg ci -Am m

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  adding a

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  abort: username 'foo\nbar2' contains a newline

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  [255]

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  $ hg ci -Am m -u "`(echo foo; echo bar3)`"

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  adding a

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  transaction abort!

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  rollback completed

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  abort: username 'foo\nbar3' contains a newline

    27

  [50]

    28