Performance analysis for exceptions in PHP (1)

exceptionPerformance1.sh

# All tests running inside a loop of 10 million iterations

# lets first try to add some code for reference. Here we are just creating a standard class

$ time cat <<EOF  | php
<?php 
    for (\$i = 0; \$i < 10000000; ++\$i) { 
        \$c = new StdClass(); 
        \$c->var = \$i;
        rand(\$i, \$i + 1000000);
    } 
EOF
real	0m1,011s
user	0m1,004s
sys	0m0,013s

# now, let's see if we try catching an exception here

$ time cat <<EOF | php
<?php 
    for (\$i = 0; \$i < 10000000; ++\$i) {
        try { 
            \$c = new StdClass(); 
            \$c->var = \$i;
            rand(\$i, \$i + 1000000);
        } catch (Exception \$e) {
        } 
    }
EOF
real	0m1,072s
user	0m1,060s
sys	0m0,016s

# Surprise! No extra time detected for running inside a try/catch block.
# Let's discard PHP is not actually optimizing this by throwing a exception there.

$ time cat <<EOF | php
<?php 
    for (\$i = 0; \$i < 10000000; ++\$i) {
        try { 
            \$c = new StdClass(); 
            \$c->var = \$i;
            if (rand(\$i, \$i + 10000000) === \$i) {
                throw new Exception('oops');
            }
        } catch (Exception \$e) {
            echo 'Random exception catched.' . PHP_EOL;
        } 
    }
EOF
Random exception catched.

real	0m1,099s
user	0m1,083s
sys	0m0,022s

# No significant time added, so adding a catch block does not affect performance.