performance comparison - Githubissues

Hi!

As part of researching ways of generating QR codes in my PHP application I did some simple performance tests comparing BaconQrCode against the CLI qrencode tool. I was expecting the BaconQrCode library to be faster than using passthru from PHP, but maybe it is not:

Method	Requests / second
`/usr/bin/qrencode`	141.03 [#/sec] (mean)
BaconQrCode 1.0.3	34.49 [#/sec] (mean)
BaconQrCode master	8.10 [#/sec] (mean)
chillerlan/php-qrcode	20.63 [#/sec] (mean)

The example code I used with the CLI tool:

<?php
$qrString = 'otpauth://totp/foo%40example.org:My%20Service%20Inc.?secret=H7ISMUHIREODCOONJUOPKJJ4HJCS2PUD&algorithm=SHA1&digits=8&period=10&issuer=My%20Service%20Inc.';
ob_start();
passthru('/usr/bin/qrencode -s 5 -t PNG -o - ' . escapeshellcmd($qrString));
header('Content-Type: image/png');
echo ob_get_clean();

For BaconQrCode 1.0.3 I used this script:

<?php

$qrString = 'otpauth://totp/foo%40example.org:My%20Service%20Inc.?secret=H7ISMUHIREODCOONJUOPKJJ4HJCS2PUD&algorithm=SHA1&digits=8&period=10&issuer=My%20Service%20Inc.';

require_once 'bacon/vendor/autoload.php';

use BaconQrCode\Renderer\Image\Png;
use BaconQrCode\Writer;

$renderer = new Png();
$renderer->setHeight(256);
$renderer->setWidth(256);
$writer = new Writer($renderer);
header('Content-Type: image/png');
echo $writer->writeString($qrString);

For BaconQrCode from master I used this script:

<?php

$qrString = 'otpauth://totp/foo%40example.org:My%20Service%20Inc.?secret=H7ISMUHIREODCOONJUOPKJJ4HJCS2PUD&algorithm=SHA1&digits=8&period=10&issuer=My%20Service%20Inc.';

require_once 'bacon2/vendor/autoload.php';

use BaconQrCode\Renderer\ImageRenderer;
use BaconQrCode\Renderer\Image\ImagickImageBackEnd;
use BaconQrCode\Renderer\RendererStyle\RendererStyle;
use BaconQrCode\Writer;

$renderer = new ImageRenderer(
    new RendererStyle(256),
    new ImagickImageBackEnd()
);
$writer = new Writer($renderer);
header('Content-Type: image/png');
echo $writer->writeString($qrString);

I tested both with BaconQrCode 1.0.3 and BaconQrCode master on PHP 7.4 (Fedora 32) by accessing the script through Apache+FPM-FPM using Apache Bench to check the performance:

$ ab -n 1000 -c 50 https://HOST/qr.php

Is this performance difference expected? Is there anything that can be done to improve the performance of BaconQrCode, maybe specific opcache configuration? Am I testing wrong? Can the PHP code be optimized? Is Composer the bottleneck? Although I tested with phpab directly as well, which didn't help much... Is there a good reason not to consider using passthru with /usr/bin/qrencode?

Thanks

Bacon / BaconQrCode

performance comparison #70