metaReader

[sm2017]

const metaReader = sharp()
  .metadata()
  .then(info => {
    console.log(info)
  })
  .catch(err => {
    console.log(err)
  })

is metaReader fast enough to using it in a high throughput server? is it block thread?
I want to pipe(metaReader) a stream , stream is a file uploaded by end user

[lovell]

"Everything remains non-blocking thanks to libuv, no child processes are spawned and Promises/async/await are supported."

http://sharp.pixelplumbing.com/en/stable/#fast

[sm2017]

@lovell I want to

• Get a file from end user
• Check dimension
• must be square
  • larger than 100x100
  • less than 1000x1000
• Generate thumbnail

I want to check dimension in main thread , but generate thumbnail in a worker thread (using rabbitmq)

I see http://sharp.pixelplumbing.com/en/stable/performance/
You have 25.30 Ops/sec , is it 1000/25=40ms blocks thread? If yes I must use worker thread , If no , can I use main thread to generate thumbnail?
What about dimension? how much it block thread?

[lovell]

Please see #1297

[lovell]

Hope this helped, please feel free to re-open with more details if not.