inferImageType is excessively slow

[hfossli-agens]

Converting the whole buffer to a hex string to only read the first few bytes is totally unnecessary.

Current code:

 inferImageType(imageBuffer) {
    switch(imageBuffer.toString('hex').substring(0,8).toUpperCase()) {

Suggestion (not tested):

 inferImageType(imageBuffer) {
    switch(imageBuffer.slice(0, 4).toString('hex').toUpperCase()) {

[gattasrikanth]

Thanks for the report. I have added this to our backlog items.

[fisenkodv]

@hfossli-agens, we have updated our solution, the issue has been fixed. If you still see the issue with the latest version (v6.0.0), please feel free to reopen the issue.

You can refer to the recent changes here.