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Question:Which is the correct syntax for benchmark?

A $this->benchmark->mark('end');
// something happens here
$this->benchmark->mark('start');
echo $this->benchmark->elapsed_time('start', 'end'); 
B $this->benchmark->mark('start');
// something happens here
$this->benchmark->mark('end');
echo $this->benchmark->elapsed_time('start', 'end'); 
C $this->benchmark->mark('end');
// something happens here
$this->benchmark->mark('start');
echo $this->benchmark->current_time('start', 'end'); 
D $this->benchmark->mark('start');
// something happens here
$this->benchmark->mark('end');
echo $this->benchmark->elapsed_time('end', 'start');

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Question:Which is the correct syntax for benchmark?

A $this->benchmark->mark('end'); // something happens here $this->benchmark->mark('start'); echo $this->benchmark->elapsed_time('start', 'end');

B $this->benchmark->mark('start'); // something happens here $this->benchmark->mark('end'); echo $this->benchmark->elapsed_time('start', 'end');

C $this->benchmark->mark('end'); // something happens here $this->benchmark->mark('start'); echo $this->benchmark->current_time('start', 'end');

D $this->benchmark->mark('start'); // something happens here $this->benchmark->mark('end'); echo $this->benchmark->elapsed_time('end', 'start');

B