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At some point back in the last century, somebody felt that reading all of pg_type twice was cheaper, or at least easier, than using repalloc() to resize the Typ[] array dynamically. That seems like an entirely wacko proposition, so rewrite the code to do it the other way. (To add insult to injury, there were two not-quite-identical copies of said code.) initdb.c's readfile() function had the same disease of preferring to do double the I/O to avoid resizing its output array. Here, we can make things easier by using the just-invented pg_get_line() function to handle reading individual lines without a predetermined notion of how long they are. On my machine, it's difficult to detect any net change in the overall runtime of initdb from these changes; but they should help on slower buildfarm machines (especially since a buildfarm cycle involves a lot of initdb's these days). My attention was drawn to these places by scan-build complaints, but on inspection they needed a lot more work than just suppressing dead stores :-( |
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