The document discusses the challenges and advancements in mining cryptocurrency using browser GPUs and WebAssembly, highlighting the performance improvements and methods like pixel shaders for optimizing hashing. It details the evolution of mining from CPUs to GPUs and the introduction of ASIC-resistant currencies, such as Ethereum and Monero. Furthermore, it mentions JS plugins like Coinhive and Coinimp for browser-based mining, underlining the persistent relevance of cryptocurrencies.

1. Mining crypto in browser
GPU, WebAssembly and all the good things to try

2. @PixelsCommander
denis.radin@gmail.com

5. State of the art games engineering

6. +
Using React/Redux for
managing HTML UI and game graphics

8. ChallengingNative.com
Fast web applications development, profiling and optimization

11. Mining as a bleeding edge
performance challenge for
web platform

12. What the hack
is mining?

20. What if I want to add a
block?
And what if everyone wants?

23. Blockchain might get
out of control
So we need to limit the ability for adding blocks

24. Proof of work
Solving math problems

25. Solved task = added block

26. Сryptocurrency rewards us
for keeping chain going!

27. Mining Bitcoin in browser
Starting from the mainstream

29. 00000000000000000
Hash to start with for valid block

31. SHA256 for hashing blocks
Which is a well explained algorithm

32. Nonce: ?

33. 1.4x10^20
Chance to get a right nonce... A lot of work!

34. So miners unite in pools...

35. And what if your users will
mine for you in a pool?

36. Time for...

37. Is my hash
implementation slow?
Nope

38. Ok, workers are better!
Doing job in parallel is cool. What about GPU
making thousands of threads in parallel?

39. Time for...

40. What about WebAssembly?
The promise to have nearly native performance...

41. Time for...

42. I heard mining on
GPU is fast...

45. In WebGL we can mine
with pixel shaders
Every pixel is a thread

48. Time for...

49. And reading results from a
texture
Every pixel is a result for particular nonce

51. GetPixel and check in JS for
every nonce hashed
Let`s reduce this performance leak by 1024 times

52. Time for...

54. 200x improvement but still
no money...
Lets see what happened

55. Evolution of mining tooling

56. CPU era

59. GPU era
As fast as 1600 CPUs

62. ASIC era
As fast as 20000 GPU

65. 20000 GPUs?
Is not this broken?
So new generation of cryptocurrency fixes this

66. Etherium?
Yes, it is ASICs-proof! But...

67. 3Gb RAM
Required for operating algorithm

68. Web is failing here...
Nor JS nor WebGL can allocate 3Gb

69. Alternatives?
Algorithm should be ASIC-proof
but available under Web limitations

70. XMR Monero
This would work...

71. Time for...

72. And even better!
There is mining as a JS plugin proposed

73. CoinHive
The mainstream

74. CoinImp
Zero commission

75. CryptoNoter
Open source

76. Is it worth money?
You decide, but cryptos are there for a long

77. @PixelsCommander
denis.radin@gmail.com