WallWextra

11 ms·

91.
by WallWextra 12y ago
A lot less "interesting," in a very good way.
92.
by WallWextra 12y ago
Also, OSX applies unicode normalization to the filenames, which can cause some interoperability problems with unix, e.g. you try to copy files forth and back between the systems and end up with two copies of a file, with identical-looking f
93.
by WallWextra 12y ago
It is here: http://www.azulsystems.com/blog/cliff/2008-11-18-brief-conve... It looks like Azul has basically given up on their custom hardware, I guess? They found a way to make their GC work on commodity x86.
94.
by WallWextra 12y ago
Replacing x86 with a RISC instruction set would do little good. Performance doesn't come from the RISCness of the decoded uops, it comes from superscalar out-of-order execution, big caches, finely-tuned branch predictors, forwarding ne
95.
by WallWextra 12y ago
Charge balancing is a common feature, often built in to charge controller ICs. Of course Tesla has to do this on a much larger scale, like with all of its power electronics. But so does a Prius. I'm not sure how much of a technological
96.
by WallWextra 12y ago
Oops! Good catch.
97.
by WallWextra 12y ago
If Apple tried that, Intel would stop giving them such sweet prices.
98.
by WallWextra 12y ago
Even if Apple could match Intel's performance in the laptop power envelope (implausible), that still wouldn't be enough. They'd have to beat it by a big enough margin to make binary translation feasible. When they switched fr
99.
by WallWextra 12y ago
The reasons I've heard were to kill US oil exploration, and also to teach the high-cost producers (Venezuela, etc) in OPEC a lesson. It's common for these countries to "accidentally" pump over quota to make some extra ca
100.
by WallWextra 12y ago
On a Galaxy S5, it works glitchily in Chrome and not at all in Firefox.
101.
by WallWextra 12y ago
It's worth pointing out that Sandy Bridge was a massive microarchitectural change from its predecessors, using a totally different out-of-order engine. I don't know why the performance characteristics are so similar. I guess once
102.
by WallWextra 12y ago
I can't think of a worse idea than prosecuting Bush administration officials. Jailing the previous administration would set a terrible precedent, and would fatally undermine the stability of our government. There are many people who ar
103.
by WallWextra 12y ago
It's great to have a coarse-grained sanity check from a trusted source, but I don't think this is really a plausible replacement for NTP (not that you need NTP when you have a mobile baseband and GPS).
104.
by WallWextra 12y ago
Semaphores are basically unused in the kernel these days, abandoned in favor of mutexes. I really recommend reading kernel/locking/mutex.c. You can learn a lot about the details of low-level synchronization, and it's also jus
105.
by WallWextra 12y ago
Using two semaphores to implement a bounded buffer has the advantage that writers and readers don't interfere with eachother until the queue is either empty or full. Of course, that might be the only good use of semaphores, and a dire
106.
by WallWextra 12y ago
The Pentium Pro was what killed Alpha and MIPS, not Itanium.
107.
by WallWextra 12y ago
It would have been nice if they had a MIPS core actually designed by MIPS.
108.
by WallWextra 12y ago
Uber is a bunch of sketchballs and a bunch of sockpuppets flagging the story is totally within the realm of plausibility.
109.
by WallWextra 12y ago
The intra-frame format of every video codec.
110.
by WallWextra 12y ago
ARM has that inline shifter and predicated instructions, both of which were removed in arm64. Those are the most salient things.
111.
by WallWextra 12y ago
Pugh taught my ODEs course in college and basically turned it into a dynamical systems party. Great class, but I still don't know anything about ODEs. Really cool guy.
112.
by WallWextra 12y ago
Construction of the reals is in an appendix at the back. He starts with ordered field axioms. Frankly there's something about the presentation in "discrete math" books that I find much more confusing and difficult than Spivak
113.
by WallWextra 12y ago
There are also some very good books by Israel Gelfand, written for a high-school level. Titles are Algebra, Trigonometry, The Method of Coordinates, etc. All by Gelfand and one other author. Sort of unusual because they are basic books writ
114.
by WallWextra 12y ago
I honestly couldn't tell what he meant, whether he had stumbled through calc 3 and gotten sick of memorizing arbitrary rules, or if he can't solve a quadratic. I tried to include some good high-school level math resources.
115.
by WallWextra 12y ago
Sure, right from the axioms.
116.
by WallWextra 12y ago
I got started on "real" math with Spivak's Calculus. Some people start with Topology by Munkres, which is not a difficult book but is very abstract and rigorous so makes a good introduction. If you feel like you have ok calcu
117.
by WallWextra 12y ago
I've sort of been assuming that Julia is capable of inlining the vectorized notation into a single traversal over the array, at least for simple types. Is that not true? EDIT: Not yet, I guess. http://pastebin.com/Tw5Pu
118.
by WallWextra 12y ago
It's longjmp.
119.
by WallWextra 12y ago
JPEG 2000 isn't actually better than plain old jpeg.
120.
by WallWextra 12y ago
Do you consider this likely?

More ›