Low performance.

We render alot of invoices and we want to add a QRCode so that users can scan the invoice with their phone. Since we render several thousand invoices performance is important. I noticed it took 25ms to render the image when warm. I used the code from readme

QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode("The text which should be encoded.", QRCodeGenerator.ECCLevel.Q);
QRCode qrCode = new QRCode(qrCodeData);
Bitmap qrCodeImage = qrCode.GetGraphic(20);

Included in the 25 Ms is saving the bitmap to a memory stream and convert it to a byte array.

We are using full framework 4.7 and the computer i tested on is a AMD 5950x. Latest nuget version

[codebude]

Hi @AndersMalmgren ,

If I read your comments correctly, you had the best performance when using the PngByteQRCode, but couldn’t use this renderer because you didn’t want the whitespace (=quiet zone). Correct?

In the latest CI build (and soon officially when I push version 1.4.2 to NuGet) there is now a new/additional parameter “drawQuietZones” available for the PngByteQRCode. If you set this to “false”, the codes will be rendered without quiet zones. With this you could take advantage of the performance benefits of the PngByteQR code.

[FawzyMokhtar]

It’s good to say that using the PngByteQRCode instead of the BitmapByteQRCode reduced the amount of memory used - in that step - from 19mb to actually NOTHING which is WooW.

I think the problem maybe with the BitmapByteQRCode itself.