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Parse catalog .dat files as a whole when compiling the backend

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Previously Catalog.pm eval'd each individual hash reference
so that comments and whitespace can be preserved when running
reformat-dat-files. This is unnecessary when building, and we can save
~15% off the run time of genbki.pl by simply slurping and eval'-ing
the whole file at once. This saves a bit of time, especially in highly
parallel builds, since most build targets depend on this script's outputs.

Report and review by Andres Freund
Discussion: https://www.postgresql.org/message-id/CAFBsxsGW%3DWRbnxXrc8UqqR479XuxtukSFWV-hnmtgsbuNAUO6w%40mail.gmail.com
This commit is contained in:
John Naylor 2022-09-08 13:23:13 +07:00
parent 0324651573
commit 69eb643b25
1 changed files with 20 additions and 2 deletions
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22
src/backend/catalog/Catalog.pm
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@ -287,6 +287,8 @@ sub ParseData
my $catname = $1;
my $data = [];
if ($preserve_formatting)
{
# Scan the input file.
while (<$ifd>)
{
@ -341,16 +343,32 @@ sub ParseData
# with --full-tuples to print autogenerated entries, which seems like
# useful behavior for debugging.)
#
# Only keep non-data strings if we are told to preserve formatting.
# Otherwise, we have a non-data string, which we need to keep in
# order to preserve formatting.
if (defined $hash_ref)
{
push @$data, $hash_ref if !$hash_ref->{autogenerated};
}
elsif ($preserve_formatting)
else
{
push @$data, $_;
}
}
}
else
{
# When we only care about the contents, it's faster to read and eval
# the whole file at once.
local $/;
my $full_file = <$ifd>;
eval '$data = ' . $full_file ## no critic (ProhibitStringyEval)
or die "error parsing $input_file\n";
foreach my $hash_ref (@{$data})
{
AddDefaultValues($hash_ref, $schema, $catname);
}
}
close $ifd;
# If this is pg_type, auto-generate array types too.