CommunityNews

CommunityNews

Faster JavaScript Calls

JavaScript allows calling a function with a different number of arguments than the expected number of parameters, i.e., one can pass fewer or more arguments than the declared formal parameters. The former case is called under-application and the latter is called over-application.

In the under-application case, the remaining parameters get assigned the undefined value. In the over-application case, the remaining arguments can be accessed by using the rest parameter and the arguments property, or they are simply superfluous and they can be ignored. Many Web/NodeJS frameworks nowadays use this JS feature to accept optional parameters and create a more flexible API.

Until recently, V8 had a special machinery to deal with arguments size mismatch: the arguments adaptor frame. Unfortunately, argument adaption comes at a performance cost, but is commonly needed in modern front-end and middleware frameworks. It turns out that, with a clever trick, we can remove this extra frame, simplify the V8 codebase and get rid of almost the entire overhead.

We can calculate the performance impact of removing the arguments adaptor frame through a micro-benchmark.

This thread was posted by one of our members via one of our news source trackers.

/js

Where Next?

Popular Frontend topics Top

First poster: bot
Two ways you can take advantage of types in JavaScript (without TypeScript) - The Blinking Caret. This blog post describes how you can e...
New
First poster: bot
Stock Toolkit: Conclusion :: Brain Dump — Geoff’s Technical Notebook. My toy stock toolkit application is “feature complete” for now. I’...
New
AstonJ
Haven’t watched it yet but posting it and bookmarking the thread :nerd_face: TypeScript continues to soar in popularity…
New
New
New
First poster: dyowee
The key reason why you (and likely most developers) struggle with CSS, is that you underestimate it. Underestimating CSS leads to a stra...
New
First poster: bot
Add WebAssembly, get performance. Is that how it really works? The incredibly unsatisfying answer is: It depends. It depends on oh-so-ma...
New
brainlid
You are storing some Phoenix LiveView state in the browser. You want to retrieve that saved state as early as possible to improve the use...
New
StuntProgrammer
It’s rare to see a web app that doesn’t use XMLHttpRequest (or fetch, the new API with comparable capability). XMLHttpRequest (which we c...
New
First poster: OvermindDL1
I have to admit: as I’ve watched Tailwind enthusiastically adopted by more and more of the frontend community, I’ve remained skeptical. B...
New

Other popular topics Top

Devtalk
Hello Devtalk World! Please let us know a little about who you are and where you’re from :nerd_face:
New
Devtalk
Reading something? Working on something? Planning something? Changing jobs even!? If you’re up for sharing, please let us know what you’...
1033 17470 383
New
dimitarvp
Small essay with thoughts on macOS vs. Linux: I know @Exadra37 is just waiting around the corner to scream at me “I TOLD YOU SO!!!” but I...
New
AstonJ
In case anyone else is wondering why Ruby 3 doesn’t show when you do asdf list-all ruby :man_facepalming: do this first: asdf plugin-upd...
New
rustkas
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
New
AstonJ
Saw this on TikTok of all places! :lol: Anyone heard of them before? Lite:
New
mafinar
This is going to be a long an frequently posted thread. While talking to a friend of mine who has taken data structure and algorithm cou...
New
DevotionGeo
I have always used antique keyboards like Cherry MX 1800 or Cherry MX 8100 and almost always have modified the switches in some way, like...
New
New
AstonJ
This is cool! DEEPSEEK-V3 ON M4 MAC: BLAZING FAST INFERENCE ON APPLE SILICON We just witnessed something incredible: the largest open-s...
New