Gladdyu

7 ms·

1.
by Gladdyu 5y ago
The difference is that software compilation is a fairly local optimization process - allowing you to change/inline one bit of generated code without significantly affecting the performance of the rest of the generated code - address sp
2.
by Gladdyu 6y ago
https://www.interactivebrokers.com/en/index.php?f=759 You'd open up a trading account, deposit funds from one country to it (generally free in EU/UK, can be done with a simple bank transfer, though can take 1
3.
by Gladdyu 6y ago
I'm not sure whether their fees are really that low. For transfers between your own accounts, for anything over very small amounts, I found that their 0.35% variable fee is pretty large compared to adding the funds to a brokerage accou
4.
by Gladdyu 6y ago
Your gain in delta (due to the stock moving) will be offset by your loss in vega (due to the volatility coming off after the impending crash). Option fair value is a function of both underlying price and volatility, which is currently at un
5.
by Gladdyu 6y ago
It does load it - mmap doesn't copy the file content into a buffer, it merely allows you to operate on a file as if it were in memory. Memory reads correspond to file read operations.
6.
by Gladdyu 6y ago
That'd be special relativity for you - nothing ever exceeds the speed of light, hence a corrective factor needs to be applied. https://en.wikipedia.org/wiki/Special_relativity
7.
by Gladdyu 6y ago
If you would write a basic scheduler, at some point you'd have to await the userspace code but you wouldn't have any way to force it to stop running. If the userspace code would enter an infinite loop it would hold the kernel thre
8.
by Gladdyu 6y ago
As described in the blog post, the rust compiler generates a state machine for every async function and generates the appropriate poll methods for the state transition. This is fundamentally at odds with the preemption, which would then hav
9.
by Gladdyu 7y ago
Intel tried that with Itanium. It didn't go well.
10.
by Gladdyu 7y ago
The issue was that there wasn't a cheap riscv board that supported the privileged section of the ISA (so you can run an OS on it). This, being a microcontroller, doesn't either.
11.
by Gladdyu 7y ago
Not Google being good - Irish law has been changed such that it's no longer permitted. "The legislation passed in Ireland in 2015 ends the use of the tax scheme for new tax plans. However, companies with established structures can
12.
by Gladdyu 7y ago
Unfortunately true exponential growth of a physical system cannot exist - it'll always be some sort of logistic model that looks exponential near x=0.
13.
by Gladdyu 7y ago
How would electromagnetism work in a world without a cross product?
14.
by Gladdyu 7y ago
https://amp.businessinsider.com/images/5271388a6bb3f7ac4756d...
15.
by Gladdyu 7y ago
https://www.youtube.com/channel/UCYO_jab_esuFRV4b17AJtAw
16.
by Gladdyu 7y ago
One example is if suddenly you would require to inherit from the same object multiple times. Example - if you have a "team" object, you might at first inherit it from a list/set (as a team could be a list of members). However
17.
by Gladdyu 7y ago
The most certainty you are going to get is by taking an open source processor core, and run it on an FPGA with an open toolchain. You won't be able to check the actual FPGA chip, though the risk seems minimal on that front compared to
18.
by Gladdyu 8y ago
I doubt those are more complex to parse than C++, as C++ parsing is undecidable. http://blog.reverberate.org/2013/08/parsing-c-is-literally-u...
19.
by Gladdyu 8y ago
Though it might finally do away with the ever-persisting Windows error messages about "this file is already open" followed by a search through all of the processes that might have it open to terminate the offender.
20.
by Gladdyu 8y ago
Yes, but you can't install a LIDAR over a software update. They've been promising full self-driving mode and getting closer by updating the software - the owners that already have the current car won't be to thrilled if they
21.
by Gladdyu 8y ago
I've attempted to run it (not with this latest release yet though) and it appeared as if calling a numpy function essentially disabled the JIT for that function, which was not acceptable for us at that point. What did seem to help curi
22.
by Gladdyu 8y ago
Some NICs are able to dump data directly into the (L3) cache (DDIO on Intel), so either the L3 will have to be encrypted or the IOMMU needs to contain the crypto functionality.
23.
by Gladdyu 8y ago
The RAM does not know anything about locking, it's the cache coherence protocol. The CPU will request a cache line in exclusive state, it does the operation on the memory and ensures that during it has always been exclusive to that cor
24.
by Gladdyu 8y ago
Unlikely any time soon - most HFTs will have massive, battle-tested C++ code bases already. The data ownership model in HFT is usually very clear - receive packet, pass through some processing pipeline, emit packet, on the same thread. If y
25.
by Gladdyu 8y ago
You could express an arbitrary (well-behaved) ODE as a neural network by discretizing it in timesteps, but you would not extract any additional parallelism. In normal ODEs you can already compute each X_{i}(t)/dt in parallel, but you w
26.
by Gladdyu 8y ago
How would this handle systems in which the dimensionality of the hidden layers is not equal to the input dimension, as is often the case? For solving the ODE you'd need to get at least 1 sample point, which might restrict the amount of
27.
by Gladdyu 8y ago
Would this not require all impls to be in the same translation unit or the linker has to be explicitly aware of it?
28.
by Gladdyu 8y ago
It's in the interaction between python and malloc and also migrating to python3 made the issue mostly go away, which was sufficient for our purposes.
29.
by Gladdyu 8y ago
I'd say it's a problem in the interaction of that specific version of python with that specific malloc. From a performance perspective we could not afford to simply force malloc to only use mmap for every small allocation (as it w
30.
by Gladdyu 8y ago
When I worked on a Python app that did real-time processing of (very large) lists of python dicts, merely processing them in a list comprehension caused "leaks" causing unbound virtual memory growth. The issue was that that for sm

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