Codeigniter by Beni - HTML preview

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The keen-eyed amongst you will also notice the highlighted lines, we've defined the start and end points for CodeIgniter to pay attention to. The first we've named bm1_start and the second we've named bm1_stop. We can call them anything we like, but that's what I've decided to call them.

We then perform the batch_ insert operation, as shown in the following code snippet: $this->benchmark->mark('bm2_start');

$data = array(

array('firstname' => 'George',

'lastname' => 'Foster'),

array('firstname' => 'Jackie',

'lastname' => 'Foster'),

array('firstname' => 'Antony',

'lastname' => 'Welsh'),

array('firstname' => 'Rowena',

'lastname' => 'Welsh'),

array('firstname' => 'Peter',

'lastname' => 'Foster'),

array('firstname' => 'Jenny',

'lastname' => 'Foster'),

array('firstname' => 'Oliver',

'lastname' => 'Welsh'),

array('firstname' => 'Harrison',

'lastname' => 'Foster'),

array('firstname' => 'Felicity',

'lastname' => 'Foster')

);

$result = $this->bench_model->add_to_db($data);

$this->benchmark->mark('bm2_end');

281

SEO, Caching, and Logging

We're defining a multidimensional array with the details of people we want to add to the database and sending it to the insert_batch() function of bench_model; now the keen eyed among you will again notice the highlighted lines. These are the bm2 start and end points. If the batch_insert() operation returns TRUE (it is inserted into the database correctly), we then call the get_people() model function again, which will return all the records from the database:

if ($result) {

// Who's in the database now?

$this->benchmark->mark('bm3_start');

foreach ($this->bench_model->get_people()->result() as $row) {

echo $row->firstname . ' ' . $row->lastname . ' ';

}

$this->benchmark->mark('bm3_end');

} else {

echo 'Cannot write to database.';

}

Again, here we define (as highlighted in the previous code) the bm3 start and end points.

That completes our database operations and we move over to reporting of the benchmarks.

We ask CodeIgniter to tell us the execution time between points:

echo ' ---- BENCHMARK POINT STATS ---- ';

echo 'BM1 (S) to BM1 (E): ' . $this->benchmark->elapsed_time('bm1_

start','bm1_end') . ' ';

echo 'BM2 (S) to BM2 (E): ' . $this->benchmark->elapsed_time('bm2_

start','bm2_end') . ' ';

echo 'BM3 (S) to BM3 (E): ' . $this->benchmark->elapsed_time('bm3_

start','bm3_end') . ' ';

For each bm1, bm2, and bm3, we want to know the time between the points specified using the $this->benchmark->elapsed_time() function. This function takes two arguments: a start point and an end point. For this recipe, we have asked CodeIgniter to report the time elapsed between each bm# point (where # is the number 1, 2, or 3), but if we wish to we can write this:

echo 'BM1 (S) to BM2 (E): ' . $this->benchmark-

>elapsed_time('bm1_start','bm2_end') . ' '

The previous code will report the elapsed time between bm1_start and bm2_end (or from the beginning of the first get_people() query to the end of the batch_insert() query).

Think of each $this->benchmark->mark('bm2_end'); as a checkpoint, and you can use $this->benchmark->elapsed_time('checkpoint_1','checkpoint_2') to return the time elapsed between them.

282

Index

Symbols

$data_to_write variable 116

$db[‘default’][‘cachedir’] option 11

$cap array 262

$db[‘default’][‘cache_on’] option 10

$config 164

$db[‘default’][‘char_set’] option 11

$config[‘cookie_domain’] = \ 126

$db[‘default’][‘database’],

$config[‘cookie_path’] = \ 127