Leszek

15 ms·

121.
by Leszek 7y ago
Slippery slope arguments slip both ways: https://www.smbc-comics.com/comic/2010-01-02
122.
by Leszek 8y ago
Comparing a 1 hour flight to a 3-4 hour train journey by those times alone is somewhat dishonest: it doesn't take into account the rest of the journey to/from the airport at either end (usually further out of the city than the mai
123.
by Leszek 8y ago
Note that the "existing" baseline compiler is now removed, and entirely replaced by the interpreter.
124.
by Leszek 8y ago
Ignition is very tightly coupled to the rest of V8, starting with that fact that it uses inline caches and the object model to maintain performance, and finishing with it itself being written in "CSA", which is an assembler DSL
125.
by Leszek 8y ago
There's no requirement for the bidding to be natural, there are plenty of artificial bidding systems -- the only constraints are that the bidding system you are using must be known to your opponent (to enforce this, I believe that on a
126.
by Leszek 8y ago
This reminds me a lot of the following xkcd comic: https://xkcd.com/1262/
127.
by Leszek 8y ago
Just a wrapper around gperf: https://cs.chromium.org/chromium/src/v8/src/parsing/keywords... https://cs.chromium.org/chromium/src/v8/tools/gen-keywords-g...
128.
by Leszek 8y ago
We recently started using perfect hashing in V8's parser, also with measurable performance improvement (even over what we had previously, a first character jump table followed by linear search). It's always nice to apply that comp
129.
by Leszek 8y ago
It'd also be interesting to explore other optimisation metrics, e.g. having common letters on the ends to allow the user to 'blindly' move the pointer to one end or the other without a need for precision. I'm also curiou
130.
by Leszek 8y ago
So does V8, albeit with a different calling convention than the surrounding C frames.
131.
by Leszek 8y ago
I believe there's some things your have to do such aren't C compatible, e.g. store fat pointers of base+length+offset instead of raw pointers, to catch OOB accesses.
132.
by Leszek 8y ago
I guess you could make pipe variadic: function pipe(val, ...funcs) { for (let f of funcs) val = f(val); } EDIT: seems like I got ninja'd by an edit :)
133.
by Leszek 8y ago
Indeed, and this is in a video game, where swapping in a different character model and audio into an identical scenario is reasonably cheap, and thus can be done for many decision. Trying to do the same thing with real actors and re-filming
134.
by Leszek 8y ago
Not to mention, the recently gone bankrupt Telltale, which suffered from decisions that claimed to make a difference to the story, but which really did nothing to the overarching plot (e.g. you choose to save character A instead of B, A is
135.
by Leszek 8y ago
Fair enough, thanks for the correction.
136.
by Leszek 8y ago
As I understand it, this was the premise of cable TV - pay for your cable, and in return you get no ads. Yet, here we are with ads on cable, because it turned out to be more profitable to both charge and show ads than just do one or the oth
137.
by Leszek 8y ago
High school physics experiments are somewhat of a different case, as "wrong but truthful" results are probably evidence of an incorrectly performed experiment, performing which correctly is part of what one is assessed on. That, o
138.
by Leszek 8y ago
Maybe this will finally end the myth that "you can be rude and insulting as long as you're right" that people seem to attribute to Linus's outbursts
139.
by Leszek 8y ago
In that V8 makes heavy use of inline caches
140.
by Leszek 8y ago
Once Node pulls in this version of V8, sure.
141.
by Leszek 8y ago
This article feels like it ends right when it begins, hinting that these fossils exist but never really diving into what they are, who researches them, how the etymologies are determined, or really anything aside from, as they call it, &quo
142.
by Leszek 8y ago
One man's competency is another man's elitism
143.
by Leszek 8y ago
Sounds like you're describing a new protocol.
144.
by Leszek 8y ago
I believe so, in this baseline implementation. In fact, that's also true of operations on doubles (non-Smi) in unoptimized code, which are stored as "heap numbers". Avoiding these allocations is one of the things an optimizin
145.
by Leszek 8y ago
Can I ask what such city you found?
146.
by Leszek 8y ago
This particular engine, V8, doesn't use NaN-boxing, because of the memory costs on 32-bit systems of using 64-bit values for boxed pointers. Instead, we use pointer tagging, relying that with word alignment, we have 2 bits free at the
147.
by Leszek 8y ago
It'd be interesting to revisit that project with wasm rather than asm.js.
148.
by Leszek 8y ago
Good question: unfortunately not. We only really generate machine code for hot, optimized functions, using TurboFan (all the other machine code, like builtins and the interpreter, is loaded from the "snapshot"). This code is prett
149.
by Leszek 8y ago
Agree to disagree on this being a universal 'abstract' gender neutral pronoun problem, and not being profession related.
150.
by Leszek 8y ago
V8 engineer here: basically, a serialized walk through the object tree, starting from the top-level script. Predominantly, this means bytecode, scoping metadata, and strings.

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