Tryangled Solutions web designing tips tricks

In PHP, there are a number of loops available for you to use. There are while loops, do-while loops, and for loops. To see which one of these were fastest, I used each of them to perform 100,000,000 iterations. These are the loops which I used:

while(++$a<100000000){}

for(;++$a<100000000;){}

do{}while(++$a<100000000)

Here are my results:

while(++$a<100000000){}: 15.519 seconds
for(;++$a<100000000;){}: 17.577 seconds
do{}while(++$a<100000000): 13.744 seconds

As you can see, my results show that a do-while loop is 21.81% faster, compared to a for loop.

# If a method can be static, declare it static. Speed improvement is by a factor of 4.

# echo is faster than print.

# Use echo’s multiple parameters instead of string concatenation.

# Set the maxvalue for your for-loops before and not in the loop.

# Unset your variables to free memory, especially large arrays.

# Avoid magic like __get, __set, __autoload

# require_once() is expensive

# Use full paths in includes and requires, less time spent on resolving the OS paths.

# If you need to find out the time when the script started executing, $_SERVER[’REQUEST_TIME’] is preferred to time()

# See if you can use strncasecmp, strpbrk and stripos instead of regex

# str_replace is faster than preg_replace, but strtr is faster than str_replace by a factor of 4

# If the function, such as string replacement function, accepts both arrays and single characters as arguments, and if your argument list is not too long, consider writing a few redundant replacement statements, passing one character at a time, instead of one line of code that accepts arrays as search and replace arguments.

# It’s better to use select statements than multi if, else if, statements.

# Error suppression with @ is very slow.

# Turn on apache’s mod_deflate

# Close your database connections when you’re done with them

# $row[’id’] is 7 times faster than $row[id]

# Error messages are expensive

# Do not use functions inside of for loop, such as for ($x=0; $x < count($array); $x) The count() function gets called each time.

# Incrementing a local variable in a method is the fastest. Nearly the same as calling a local variable in a function.