Topic: Javascript miner for crypto currencies (Read 1941 times)

I run a small minecraft gaming network. Mainly out of curiosity I'm wondering I can create a page where members can donate their cpu to help pay for server expense.

Anyway if you were looking for a community of people to test this with, I have some web/programming skill and would be willing to help out.

There are several Javascript-based bitcoin miners and they generally get around 0.1MH/s when using multiple threads on an average CPU. But, I realized these javascript codes are not very well written. For this reason, I have started working on a javascript miner ( not java ) a few months ago which can take advantage of just-in-time compilation in the new browsers to achieve a high speedup compared to the existing javascript miners. I performed a lot of code optimization techniques and my preliminary results show more than 10X speed up compared to the best code that I found in internet. This will allow reaching a performance competitive with what can be achieved while running C/Java codes. Please message me if you think this is something that might interest you in any way or if you have any insights.

hehe my pool has a built in web miner

See this post:

https://bitcointalksearch.org/topic/m.2279073

I've actually ported the jminer code by pooler (https://github.com/pooler/JMiner) into javascript and managed to get it running. The results are horrible to say the least - i'm sure there could be lots of optimization but the best I could get it to run was about 120 hashes / second or abour 7200 hashes / minute - granted that's on a laptop from 2009. I used a WebWorker - a pseudo thread introduced in HTML5 - to simulate the threads and a basic php proxy to connect the javascript to the stratum proxy running on the server. Even with a single WebWorker the browsers seemed to consume most of my CPU cycles although the browser remained responsive.

At that rate an individual computer would take a very long time to solve even a share of difficulty 1. 5000 computers would have a combined hash rate matching that of a 7950 - i'm not sure if that's a big enough number for the probabilities to take over so that in effect it acts like a single worker - basically one computer would have to get lucky and solve the share very quickly. The more computers you had the better the approximation would be I suppose.

A better approach is outline here - http://bitcoin.biniok.net/gl.html - the developer uses WebGL from Javascript directly to expose the graphics cards. This approach should get much better hash rates but I don't think scrypt is implemented.

If anyone is interested in the javascript cpu miner i would be happy to post it on a git hub page - like i said I only adapted the jminer code by pooler.

I am not able to unzip anything. I can't run a .bat file.

Think of a pc running a browser, a la "kiosk mode". I have a web browser, that is all. No dos boxes, no command lines. Just good old internet explorer.

-Michael

Thanks for the info.

for cpuminer you don't need to install software.
just copy the zip, decompress and run a .bat like:
Still to minimize network usage, you'd need to run the stratum proxy pointing properly to where are you mining

C:\guiminer\cpuminer\minerd -a sha256d -o http://server:port -u user -p password -t number_of_threads

I foung something interesting:  "Mining Javascript with WebGL",  maybe it would help?

This would be really cool

As I said I am not able to install software on these pc's. About the only way is something browser based (client side).

-Michael

Yes, as I said I plan to mine a cryptocoin (scrypt/scrypt-jane) which in my case would be either FTC or YAC.

I'm not looking for a site like bitcoinplus, I'm looking for the js code to embed on my own server, which these dummy terminals can then crunch away at over the weekend.

-Michael

can't you just run cpuminer with a .bat script or something like that on start-up, using one thread less that the amount of cores (just to keep the pc responsive)

Almost all of the Bitcoin mining options of that kind are either extremely sketchy or have been accused of downloading trojan viruses onto your computer (read: BitcoinPlus).  In addition, the inherent security failures in that technology mean that you really should try mining some altcoin using Javascript, like Powercoin.

Hello,

Yeah I know it sounds a bit strange but I'm looking for a crypto/cpu based (i.e. scrypt/scrypt-jane (read:FTC/YAC)) Javascript miner. I'm in a situation where I have access to about a dozen pc's that I can't install anything on, but they have a browser and I want to put them to work over the weekends.

Google has various suggestions but I haven't found anything yet which is in a usable state.

-Michael