tcas

20 ms·

151.
by tcas 15y ago
Stealing is a bit of a loaded word. The HFT algos provide immense liquidity to the market by, well, executing tons of transactions every second. This means when you decide you want to purchase 100 shares of a stock, one of the automated mac
152.
by tcas 15y ago
Wow, those examples took me a while to go through and understand; it's amazing the level you can optimize a piece of code to hardware. I'm curious to benchmark the implementations and see the performance difference. Maybe you or someone els
153.
by tcas 15y ago
Yup, there's usually a primary exchange, but a stock can be traded on many exchanges. Years ago people could make money via arbitrage between exchanges. Essentially if stock ABC costed $50 at one exchange, but people were willing to buy ABC
154.
by tcas 15y ago
Xilinx's Vertex 7 FPGA uses a stacked design for the interconnects. The FPGA logic is all 28nm, but sitting under it is a completely passive 65nm interconnect layer. http://www.xilinx.com/products/technology/stacked-silicon-in...
155.
by tcas 15y ago
I've used bit shifting a lot when dealing with any sort of audio/video applications. Specifically, when muxing audio and video into a container (i.e. MPEG transport streams) you need to set up a bunch of bit flags that are packed very tight
156.
by tcas 15y ago
Looks really cool. If I understand it correctly, the first call to lthread_create() in the main thread will create a new pthread with a local scheduler. Each call to lthread_create() in that lthread will create local lthreads in that schedu
157.
by tcas 15y ago
Interesting. I know in x264 there's a non-deterministic option when using multithreading that can speed up encoding and quality sometimes, otherwise it always produces the same output.
158.
by tcas 15y ago
> Establish 2-way communication The middle pin on a magsafe power supply is used to send data two ways. It uses the 1-wire protocol and passes along (among other things), the serial number of the charger, the amperage of the charger, th
159.
by tcas 15y ago
I'll see what I can do, unfortunately generating a sample sliding window playlist isn't the easiest thing in the world to do (I can't post the feed I'm testing it with). Looking at access logs it appears to have something to do with reloadi
160.
by tcas 15y ago
Interesting new look. I was excited about getting HTTP Live Streaming support in VLC, however, it seems to be broken for sliding playlists, which is surprising since I thought it hooks into libav* for a lot of that stuff, which does have su
161.
by tcas 15y ago
I don't think so. According to the FAQ they don't think it'll change ( http://www.videolan.org/press/lgpl-libvlc.html ). The LGPL requires dynamically linking the library or providing the raw object files if statically linked to allow the e
162.
by tcas 15y ago
Back when I took a VLSI class my professor showed an awesome animation of clock distribution at various frequencies. http://www.research.ibm.com/people/r/restle/Animations/DAC01... Check out the animations under "Clock Distributions" (num
163.
by tcas 15y ago
I've used cJSON ( http://sourceforge.net/projects/cjson/ ) in the past, which worked very well for what I needed (simple 1 file JSON parser for config files). Maybe I'll give this a shot the next time I need to do some simple JSON parsing.
164.
by tcas 15y ago
This seems like a possible security hole. I wonder what will happen if you forge the HTTP header to pretend your someone else.
165.
by tcas 15y ago
Does anybody know the legality of checking these lists? I'm always concerned that the access logs are sent to various authorities.
166.
by tcas 15y ago
Pretty minimal. If you have TrueCrypt installed you can run a benchmarks of various algorithms. It's especially fast if you have a modern processor with AES-NI (hardware AES instructions) -- I get around 1GB/s Encrypt/Decrypt using AES on a
167.
by tcas 15y ago
Running php -a will give you an interactive shell as well, however, if you do a lot of php development phpsh http://www.phpsh.org/ is a lot more feature rich and can be a huge timesaver.