function causing slow load time
i had this function matching a uid using a binary select query. The sites were loading in about 8 full seconds according to my load timer, sometimes up to 12 seconds!
So this was running on old site code, really just a big mess.
But i copied it to another site and tested each function and the sql that ran on them to see which one was causing the lag time.
This query took about 0.03 seconds to return when tested.
SELECT $field_name FROM $table_name where binary $uid_field_name = '$uid' LIMIT 1
I think I added the binary option as it was not selecting the uid correctly, but removing the binary seems to not make any difference to the results, but reduces this query time a lot.
Test site with 8+k pages was loading in:
Page generated in 8.3164 seconds.
Then after removing the binary select query and just using a normal query, the same page is now.
Page generated in 0.2958 seconds.
So makes a large difference, and more depending on the page or record number i think.
PHP
function get_single_by_uid($field_name,$table_name,$uid,$uid_field_name = "uid") {
global $db;
$x = "";
$uid = mysqli_real_escape_string($db, $uid);
$field_name = mysqli_real_escape_string($db, $field_name);
$table_name = mysqli_real_escape_string($db, $table_name);
//$sql = "SELECT $field_name FROM $table_name where binary $uid_field_name = '$uid' LIMIT 1";
$sql = "SELECT $field_name FROM $table_name where $uid_field_name = '$uid' LIMIT 1";
$result = $db->query($sql);
if(!$result) { return false; }
$x = mysqli_fetch_assoc($result);
if(isset($x[$field_name])) {
return(politeify($x[$field_name]));
}
return false;
}View Statistics
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"Olivia, my eldest daughter, caught measles when she was seven years old. As the illness took its usual course I can remember reading to her often in bed and not feeling particularly alarmed about it. Then one morning, when she was well on the road to recovery, I was sitting on her bed showing her how to fashion little animals out of coloured pipe-cleaners, and when it came to her turn to make one herself, I noticed that her fingers and her mind were not working together and she couldn’t do anything. 'Are you feeling all right?' I asked her. 'I feel all sleepy,' she said. In an hour, she was unconscious. In twelve hours she was dead. The measles had turned into a terrible thing called measles encephalitis and there was nothing the doctors could do to save her. That was...in 1962, but even now, if a child with measles happens to develop the same deadly reaction from measles as Olivia did, there would still be nothing the doctors could do to help her. On the other hand, there is today something that parents can do to make sure that this sort of tragedy does not happen to a child of theirs. They can insist that their child is immunised against measles. ...I dedicated two of my books to Olivia, the first was ‘James and the Giant Peach’. That was when she was still alive. The second was ‘The BFG’, dedicated to her memory after she had died from measles. You will see her name at the beginning of each of these books. And I know how happy she would be if only she could know that her death had helped to save a good deal of illness and death among other children."
I just checked google books for BFG, and the dedication is there.
https://www.google.com.au/books/edition/_/quybcXrFhCIC?hl=en&gbpv=1
Roald Dahl, 1986
