Image Upload and manipulation API taking more time

问题:

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.

回答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