图像上传和操作API需要更多时间来获取更高分辨率的图像

Question

My Current flow that I am following for image upload and its manipulation on the S3 bucket is as follows:

1. Image is uploaded into an S3 Bucket .
2. Retrieving the image buffer of the saved image in the S3 Bucket .
3. Resizing of the image buffer using gm and imagemagick npm module.
4. Saving the resized image buffer with the original extension as a new image in the S3 Bucket .

As the image size increases so those the API response time.It takes 3 secs for the API to give a response while following above workflow for a 300 KB image and 30 secs for a 15 MB or more image.

I don't know if my flow is correct or not. My requirement is that I need to reduce my API response time while uploading a 15 or more MB image. Can somebody suggest me how to achieve this?

EDIT

To make it clear I am uploading a single 15 MB file which I am sending it from Advanced Rest Client (a chrome plugin) to my API. The image file is currently present in my local system. I am currently working on jpg and png images. I want to resize the image to both bigger and smaller sizes by reducing the width to height ratio . The API that I Have written is in Node JS which follows the above workflow.

Answer 1

Seems like upload and download big image from S3 takes a lot of time.

You can do some optimizations:

• Try to use graphicsmagick package, in common cases it's faster that imagemagick (latest versions)

• Make resize / optimize operations before uploading to S3 and upload at last step

• If it's not possible - try to use Streams for downloading - resizing - uploading to S3. just pipe request stream to gm module and write pipe to AWS S3

• Make image optimizations from Amazon EC2 infastructure, it's having very high network perfomance with S3