使用PHP优化执行时间

Question

I'm processing roughly not less than 25,000 records. However, it somehow exceed the maximum execution time. I am using Codeigniter 3.0.

The Records was the text data from a PDF that was processed by the library I made. It seemed to be not exceeding the execution time if I only show it, but when things starts to be complicated, like processing it to the database(MySQL), it exceeds the 300sec(I reconfigured this) execution time.

To illustrate

  function process() {

        $data = processThePDF(); //outputs the records / 25,000 records

        if ($data) {
                    foreach ($data as $dt) {

                        $info = $this->just_another_model->view($dt['id']); //get the old record

                        if ($info) {
                            //update
                            $this->just_another_model->update([$params]);
                            //Log Update
                            $this->just_another_model->log([$params]);
                        } else {
                            //Register
                            $this->just_another_model->update([$params]);
                            //Log Register
                            $this->just_another_model->log([$params]);
                        }
                    }
                }
}

So my questions are: 1. Is there a better way to optimize this? 2. Is convenient to write a json file or a text file before processing it?

Answer 1

Store your data in an array and update/insert it by batch.

function process() {

$data = processThePDF(); //outputs the records / 25,000 records
$update_data = array();
$update_data_2 = array();

if ($data) {
    foreach ($data as $dt) {

        $info = $this->just_another_model->view($dt['id']); //get the old record

        if ($info) {        
            $update_data[] = array($params);
        } else {
            $update_data_2[] = array($params);
        }
    }

    if(count(update_data) > 0) 
        $this->just_another_model->update_batch($update_data);
    if(count(update_data_2) > 0)
        $this->just_another_model_2->update_batch($update_data_2);
}

Furthermore, you can get your old records by batch before the loop and format it into array that so you can access it by id: $old_records[$dt['id']]