pkolaczk

50 ms·

631.
by pkolaczk 6y ago
Initial price tag: ICEs and HEVs win by a large margin Acceleration: depends, not all EVs are Teslas; additionally this is a moot point, because we're not comparing race cars, and you'd be blocked by traffic anyways most of the ti
632.
by pkolaczk 6y ago
If you assume using public chargers, then the cost-per-mile calculation needs to be updated, because electricity prices at the charging stations are much higher than the cost of electricity at home. Here where I live, in Poland, the differe
633.
by pkolaczk 6y ago
Here in Poland, if you charged at a charging station, it would cost you twice MORE than refueling a classic HEV, and it would also take longer - so overall less convenient. If you don't plan to charge it mostly at home, it will never p
634.
by pkolaczk 6y ago
Electronics is cheap and easy to replace. If properly designed and protected from heat and water - practically doesn't wear out. Mechanical problems like corrosion of structural parts is almost always uneconomical to fix.
635.
by pkolaczk 6y ago
It can be actually tied pretty well to business logic. You can explicitly model some business rules, e.g. a subscription cannot exceed the lifetime of the user account, etc. Similar to how you can use static type system to prohibit invalid
636.
by pkolaczk 6y ago
Maybe I'm weird, but I find the explicit ownership, mutability and lifetime information encoded in Rust definitions very helpful at understanding a new code-base. Something that otherwise needs to be documented in comments / exter
637.
by pkolaczk 6y ago
> And of course, the long list of disadvantages, the most obvious of which is inflexible and slow development This claim requires some data to back it up. I know at least a few people (including myself) who are more productive in Rust th
638.
by pkolaczk 6y ago
You can write Perl in any language. Lack of expressive power in the language can also lead to a disaster. Sure, Java maybe doesn't have a fancy typesystem and macros, but then the same kind of clever developers use runtime reflection a
639.
by pkolaczk 6y ago
If you are forced to write pure C (or a very low level subset of C++) , then that is often because: - you need every tiny bit of performance, - you optimize for low executable size or low memory footprint (e.g ATTiny13) - you have an exotic
640.
by pkolaczk 6y ago
"Developer productivity is through the roof though." I learned Python after I learned C, C++, Java, Scala, Rust and a few others. I fail to see my productivity going through the roof with Python. It's quite the opposite. Writ
641.
Estimating Benchmark Results Uncertainty(pkolaczk.github.io)
2 points by pkolaczk 6y ago|0 comments
642.
by pkolaczk 6y ago
> Your code might contain some basic security errors that you would have avoided had you gone with a stable, vetted framework On the flip side, stable and vetted popular frameworks also have security problems; and although these problems
643.
by pkolaczk 6y ago
Of course you can call C functions, but it is neither ergonomic nor performant. And good luck exchanging more complex data structures. Java can't use C structures directly, Rust can.
644.
by pkolaczk 6y ago
A lot more than Rust? Do you count the whole embedded, low latency and scientific computing? As far as I like Scala, I don't think it is better in these areas than Rust. Even the async I/O libraries are more advanced in Rust than
645.
by pkolaczk 6y ago
> ... and scalac is as slow as a C++ compiler Scalac is as fast as Javac if you don't overuse Scala-specific features which are known to compile slowly - implicits and macros. But it is unfair to use these features and than complain
646.
by pkolaczk 6y ago
Seriously? How to do data structures: 1. just put everything ad-hoc into a dict or a list (the "PHP" way :D) 2. use a namedtuple 3. define a class 4. define a dataclass (preferred) but works only if your Python version is recent
647.
by pkolaczk 6y ago
> But when you're in a team, or worse, in a large company, it starts to be a problem that everyone can use their own style I was in many failed or semi-failed projects and code style was never the problem. Yes, people do use sli
648.
by pkolaczk 6y ago
Having switched from Scala to Python recently, I must say Python has probably 5x more ways to do things than Scala and I can't see people complaining on Python's complexity. This is something that really surprised me, because &quo
649.
by pkolaczk 6y ago
Rust is a great language, and Scala is a great language, but they are different. They optimize for a different thing. Rust definitely rocks at high-performance, resource management, fine grained control over all the aspects of the program,
650.
Benchmarking Apache Cassandra with Rust(pkolaczk.github.io)
1 points by pkolaczk 6y ago|0 comments
651.
by pkolaczk 6y ago
50% faster and 150% more expensive are numbers my experience doesn't agree with. First, programs coded in Rust are typically nowhere near 50% faster than the ones coded in managed languages - I observe 500% to 5000% differences. And it
652.
by pkolaczk 6y ago
For things like string processing and data analysis I find Scala much more productive than Python. There are REPL / notebooks for quick iteration just like in Python, but static typing helps tremendously with getting things right the f
653.
by pkolaczk 6y ago
The worst case for a hashtable degenerating to a linked list can be often exploited to form a DOS attack. It is enough that user controls the keys inserted to the hashtable and the hash function is not cryptographically secure (typically th
654.
by pkolaczk 6y ago
Google is a huge company and the majority of its employees are not contributors to ISO C++.
655.
by pkolaczk 6y ago
2 - and your link only shows that Go, Java and C# have substantially lower performance than C and Rust on this task. So that doesn't refute my point. As I said, the whole trick relies on the fact that these languages don't need so
656.
by pkolaczk 6y ago
Sure, but then when they finally ship Valhalla you'll still need to rewrite your 4M LOC Java app to use value types ;)
657.
by pkolaczk 6y ago
1 - The tradeoff between latency, throughput and memory-use of tracing GCs is universal and language-independent. Some implementations may be better than the others, but I haven't seen an implementation that is good in all three aspe
658.
by pkolaczk 6y ago
Very subjective. I find Python much less productive than Rust. Easy to learn != productive in the long run.
659.
by pkolaczk 6y ago
When Java came out, and later when C#/.NET arrived some people did the same with them. Nihil novi. It is often easier to get decent performance in tiny projects or micro-benchmarks, simply because you can spend so much more time on opt
660.
by pkolaczk 6y ago
VSCode, Slack, Intellij Idea, some random JS on a website - indeed all C++ programs. I'm not arguing against GC, but more about the philosophy of saying that only 2% programs need a good level of performance. It starts from using GC in

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