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Avoid function call overhead of pg_popcount() in syslogger.c.

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Instead of calling the pg_popcount() function for a single byte, we
can look up the value in the pg_number_of_ones array.

Discussion: https://postgr.es/m/20240401221117.GB2362108%40nathanxps13
This commit is contained in:
Nathan Bossart
2024-04-02 10:32:49 -05:00
parent 6687430c98
commit 4133c1f45c
1 changed files with 1 additions and 1 deletions
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src/backend/postmaster/syslogger.c
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@@ -898,7 +898,7 @@ process_pipe_input(char *logbuffer, int *bytes_in_logbuffer)
if (p.nuls[0] == '\0' && p.nuls[1] == '\0' && if (p.nuls[0] == '\0' && p.nuls[1] == '\0' &&
p.len > 0 && p.len <= PIPE_MAX_PAYLOAD && p.len > 0 && p.len <= PIPE_MAX_PAYLOAD &&
p.pid != 0 && p.pid != 0 &&
pg_popcount((char *) &dest_flags, 1) == 1) pg_number_of_ones[dest_flags] == 1)
{ {
List *buffer_list; List *buffer_list;
ListCell *cell; ListCell *cell;