Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Black Hat USA 2021 Review

l3ouu4n9.github.io

Post reply on HN
Print view View original

21–30 of 35 posts

Re: Black Hat USA 2021 Review

#21

Post by codetrotter »

xuki wrote: post #18
po1nter wrote: post #17

Earlier quoted context omitted.

I mean that's what you get for using PNGs for pictures.

It's not the format but the image size. For example: https://l3ouu4n9.github.io/2021/note/BHUSA/1.png - 37 megapixel - 50MB.

The irony of it is that the image isn't all that sharp either. There are many pixels, but not enough detail in the actual image to warrant that many pixels IMO.

This image could have been scaled down from it's current dimensions of 9894x3786 down to say 1920x210, and it would still probably contain basically the same amount of information really.

Re: Black Hat USA 2021 Review

#22

Post by codetrotter »

pastrami_panda wrote: post #15
xuki wrote: post #14

Warning: this site use ~250MB of your data for all the photos. Mobile users, beware!

On my phone it opens the page almost instantly and then lazy loads each image as it comes into view.

Are you using an iPhone by chance? I think that Safari on iOS does this automatically without any additional involvement on the part of the site itself.

Re: Black Hat USA 2021 Review

#24

Post by luke2m »

codetrotter wrote: post #22
pastrami_panda wrote: post #15

Earlier quoted context omitted.

On my phone it opens the page almost instantly and then lazy loads each image as it comes into view.

Are you using an iPhone by chance? I think that Safari on iOS does this automatically without any additional involvement on the part of the site itself.

Firefox for Android seems to do this.

Re: Black Hat USA 2021 Review

#27

Post by ganoushoreilly »

The business hall this year was easily 1/4 to 1/5 the usual occupancy and the over all conference was extremely small. Most everyone that picked up a Defcon badge was also given free access to the Business hall.

That said, the smaller crowds at both BH & DC made for a pretty good year. It was a nice calm emergence from the past year +.

Re: Black Hat USA 2021 Review

#28

Post by b112 »

capableweb wrote: post #16
pastrami_panda wrote: post #15

Earlier quoted context omitted.

On my phone it opens the page almost instantly and then lazy loads each image as it comes into view.

Strange, on desktop it pulls down all the images on page load. The problem is not really about if the images are lazy-loaded or not though, the author is using the wrong format for the images. There are just 16 images, but each one is over 10MB big because the author is using PNG for photographs, when they really should be using JPG instead.

Maybe they don't prefer loss and compression? We all have our (often disagreeing) preferences...

Re: Black Hat USA 2021 Review

#29

Post by coopreme »

qweqwweqwe-90i wrote: post #12

Looking forward to the videos - I wish they wouldn't hold them for 6 months. Actually, are there some "blackhat" sites that host the videos earlier? :)

Well they sell access to them so probably another way make the ‘ole hacker conference a little less Blackhat and a lot more Greenback.

Re: Black Hat USA 2021 Review

#30

Post by stjohnswarts »

codetrotter wrote: post #21
xuki wrote: post #18

Earlier quoted context omitted.

It's not the format but the image size. For example: https://l3ouu4n9.github.io/2021/note/BHUSA/1.png - 37 megapixel - 50MB.

The irony of it is that the image isn't all that sharp either. There are many pixels, but not enough detail in the actual image to warrant that many pixels IMO. This image could have been scaled down from it's current dimensions of 9894x3786 down to say 1920x210, and it would still probably contain basically the same amount of information really.

...even as a jpg :)
Post reply on HN