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Despite being a voice and text chat app, Discord sees over a hundred million images passing through its tubes every day. While we wish it was as simple as sending them out across the tubes to your friends, delivering these images creates some pretty large technical problems. Linking directly to images would leak users’ IP addresses to image hosts, and large images use up lots of bandwidth. To circumvent these problems, Discord needs an intermediary service to fetch images on behalf of users and then resize them to reduce bandwidth usage.


https://blog.discordapp.com/how-discord-resizes-150-million-images-every-day-with-go-and-c-c9e98731c65d
2018/01/03 12:48 2018/01/03 12:48
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A fast and robust image library for Go built on libvips


This package wraps the core functionality of libvips image processing library by exposing all image operations on first-class types in Go. Additionally, it exposes raw access to call operations directly, for forward compatibility.

How fast is libvips? See this: Speed and Memory Use

This library was inspired primarily based on the C++ wrapper in libvips.

The intent for this is to enable developers to build extremely fast image processors in Go, which is suited well for concurrent requests.

Libvips is generally 4-8x faster than other graphics processors such as GraphicsMagick and ImageMagick.

https://github.com/davidbyttow/govips
2018/01/03 09:42 2018/01/03 09:42
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Concurrency in golang and a mini Load-balancer


INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

https://gist.github.com/rushilgupta/228dfdf379121cb9426d5e90d34c5b96

2017/12/30 09:46 2017/12/30 09:46
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In summary I hope this article offers some solid advice around dealing with Go’s mutexes. Please play with Go’s lower-level synchronization primitives, make your mistakes, respect and understand the tools. Above all, be pragmatic in your development and use the right tool for the job. Don’t be scared like I was originally. If I always listened to every negative thing said about multi-threaded programming and locking I wouldn’t be in this business today writing kick-ass distributed systems while getting to use a kick-ass language like Go.


source: https://hackernoon.com/dancing-with-go-s-mutexes-92407ae927bf
2017/05/28 14:44 2017/05/28 14:44
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분류없음  2017/05/28 14:42
If you’ve read this far and liked reading, then consider pressing the likebutton. My understanding is that is what the button is for, and it’s a shame to waste it.


source : https://hackernoon.com/cache-as-cache-can-e3cf86552263
2017/05/28 14:42 2017/05/28 14:42
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  1. 내 맘대로 보는 세상  2009
    맘에 안드는 Internet Explorer 업데이트 방침!
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