Minor cleanup and performance improvement in pgsql

[nielsdos]

See individual commits.

[devnexen]

do you think it s possible to do a "humanly noticeable benchmark" of these improvements ?

[nielsdos]

I tried benchmarking this:

<?php
$conn_string = "host=localhost port=5432 dbname=test user=postgres password=postgres";
$conn = pg_connect($conn_string) or die("no");

$params = array_fill(0, 5, 'this is an input string for the pgsql query');
$query = 'SELECT $1,$2,$3,$4,$5';
for ($i = 0; $i < 5000; $i++) {
    $result = pg_query_params($conn, $query, $params);
}

But the noise is too high, the variance is huge. Most of the time (>60%) is spent in the kernel with only a few percentages in PHP itself. Running a perf shows that the time spent in pg_query_params halves. In any case, the memory usage (noticeable for long strings) should also decrease

[devnexen]

no idea if you plan any further changes but looks fine as it is.