I don’t know and I doubt anyone else does off the top of their head, so why 
don’t you write a test and see?

Image processing is highly image and usage dependent, e.g. acceptable quality 
vs. speed vs. memory.

Using non-quantifiable terms like “huge” is not testable nor verifiable.

> On May 10, 2020, at 9:50 PM, Vivi <createmap4...@gmail.com> wrote:
> 
> 
> How does it compare to vipsthumbnail that utilize low memory usage which I 
> believe it use horizontal threading, does Go's image/draw package consume 
> large memory if the image source is huge?
> 
> 
> On Monday, 11 May 2020 07:00:11 UTC+8, Nigel Tao wrote:
> On Mon, May 11, 2020 at 4:28 AM robert engels <ren...@ix.netcom.com <>> 
> wrote: 
> > All of the code to do scaling and cropping in the ‘image’ package in the 
> > stdlib. 
> 
> Cropping is in the stdlib but scaling is not. Various scaling 
> algorithms (e.g. nearest neighbor, Catmull-Rom) are in the 
> golang.org/x/image/draw <http://golang.org/x/image/draw> package instead. As 
> https://godoc.org/golang.org/x/image/draw 
> <https://godoc.org/golang.org/x/image/draw> says, "This package is a 
> superset of and a drop-in replacement for the image/draw package in 
> the standard library". 
> 
> https://godoc.org/golang.org/x/image/draw#example-Draw 
> <https://godoc.org/golang.org/x/image/draw#example-Draw> has some example 
> code. 
> 
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