Date | Commit message (Collapse) |
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Otherwise, walking backwards through history could mean the root
message in a thread forgets its `tid' and it prevents messages
from being looked up by it.
This bug was hidden by the fact that `sid' matches were often
good enough to link threads together.
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In many cases, we do not care about the total number of
messages. It's a rather expensive operation in SQLite
(Xapian only provides an estimate).
For LKML, this brings top-level /$INBOX/ loading time from
~375ms to around 60ms on my system. Days ago, this operation
was taking 800-900ms(!) for me before introducing the SQLite
overview DB.
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This ought to provide better performance and scalability
which is less dependent on inbox size. Xapian does not
seem optimized for some queries used by the WWW homepage,
Atom feeds, XOVER and NEWNEWS NNTP commands.
This can actually make Xapian optional for NNTP usage,
and allow more functionality to work without Xapian
installed.
Indexing performance was extremely bad at first, but
DBI::Profile helped me optimize away problematic queries.
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Too many similar functions doing the same basic thing was
redundant and misleading, especially since Message-ID is
no longer treated as a truly unique identifier.
For displaying threads in the HTML, this makes it clear
that we favor the primary Message-ID mapped to an NNTP
article number if a message cannot be found.
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We can't rely on header order for Message-ID after all
since we fall back to existing MIDs if they exist and
are unseen. This lets us use SearchMsg->mid to get the
MID we associated with the NNTP article number to ensure
all NNTP article lookups roundtrip correctly.
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Using update-copyrights from gnulib
While we're at it, use the SPDX identifier for AGPL-3.0+ to
ease mechanical processing.
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Due to the asynchronous nature of SMTP, it is possible for the
root message of a thread (with no References/In-Reply-To)
to arrive last in a series. We must preserve the thread_id
of the ghost message in this case, as we do when vivifiying
non-root ghosts.
Otherwise, this causes threads to be broken when the root
arrives last.
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