Here's Why Node JS is NOT Single Threaded
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Timestamps
0:00 Teaser
0:11 Video Starts
0:44 Operating System Fundamentals
1:45 LibUV
2:42 Bcrypt function
3:27 Node.js System
8:07 Conclusion
8:31 Outro
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Hey! I'm Mehul Mohan, a CSE'21 graduate from BITS Pilani, Goa. I started coding early in life, at the age of 13 when I created my first blog on Blogger. I am listed in Google, Microsoft, Sony, eSet, etc. Hall of Fame for reporting vulnerabilities in their systems.
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Node JS is NOT Single Threaded | Here's Why
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@devorein 2 жыл бұрын
The breadth of topics you cover is jaw-dropping. Always look forward to your videos.
@mayursonawale475 2 жыл бұрын
This is really perfect and detailed version of background processing while using node js. Saw it once, now it's printed in my brain 🔥. Thank you so much for this video and looking forward a great learning curve with you.
@indurkar4338 2 жыл бұрын
The explanation you give for everything including NodeJS Multi Thread, CORS, Networking Basics etc is Amazing. Due to your videos I can understand these concepts clearly. Keep making such wonderful videos for us.
@jijin2450 2 жыл бұрын
I watched this video till end 🏃🏃🏃
@enlightened3945 2 жыл бұрын
This is too good! I have recently been watching your videos. Thanks and respect to your hard work.
@rasikaraja1840 11 ай бұрын
I watched this video till end. Great content.
@arpanghoshal2579 2 жыл бұрын
Great explanation. Does this only happen for something like a C++ binary? Can I make use of multithreading when writing normal javascript code in node js, I believe when we use promises it just uses the event loop which is concurrent but not parallel so it is still utilizing only a single core of our cpu.
@electrolyteorb Жыл бұрын
Just learn Go (With a grain of salt)
@arpanghoshal2579 Жыл бұрын
@@electrolyteorb Yes Go lang is great, though I haven't used it yet. I mainly work with Elixir which is very good at concurrent or parallel processing.
@jayjani740 2 жыл бұрын
Your explanation is pretty much clear for me. Thanks alot :) Can I get some animated stuff of these process? Would really help me and others like me alot. :D
@eswarprasad9773 Жыл бұрын
if the Libuv thread pool gets hold of all the cores in our system, how does a separate nodejs process like cluster or pm2 instance run a different process with its own libuv thread pool and main thread ??
@rankersfundae6884 2 ай бұрын
for example 500 request comes....and each has to perform 10 task and some task's code may be synchronous and some task's code is asynchronous......as node js is single threaded it will put of all the request in a queue..it takes out 1 request and that request is to run 10 task .....out of which say 4 task'code are asynchronous so that 4 task command will go to thread pool right?....remaining 6 task is performed and result is generated.....now when the 4 lines asynchronous task result is generated the all 10 task result is clubed and response is send ...then for request 2 same thing happens.....so why we say node js can handle multiple request at a time.......or is it like when request1 6 sync task is completed......the other 6 task of request 2 starts to get executed even though request 1 4 async task has not completed so node js is making the request run concurrently and not parallely this shows the single threading nature....if for suppose node js might have been multi threading that we could have access multiple request parallely......am i getting it correct?
@andreigatej6704 2 жыл бұрын
Thanks for the great video. Did you actually dive deep into libuv's source code? Would be very interesting to see some videos where one points out how things really take place under the hood.
@FaruqHameed-sl9gq Жыл бұрын
I watched this till the end. Thanks
@gourabmukherjee2169 Жыл бұрын
This concept seems more like what nodejs provides as worker threads for a compute heavy system. Is the concept same for IO intensive tasks as well? My question is which part exactly is responsible in os watching for a db query to be fulfilled?
@eyeamkd Жыл бұрын
Amazing video. Loved it to the “core”
@balaganesh3440 Жыл бұрын
Astonishing explanation..
@madannikalje760 Жыл бұрын
This is exactly what I was thinking... Thank you so much
@daimoncardenas5074 2 жыл бұрын
You are expert in Javascript. Thanks Engineer. Regards.
@debrajash9376 Жыл бұрын
Awesome Explanation
@anuraghazra4772 2 жыл бұрын
Underrated channel. 🔥
@VishnuVijai_ 2 жыл бұрын
Thank you so much this must be relevant with all Web server : instances configurations.
@subhankardas7207 2 жыл бұрын
Awesome !! Thanks a lot ! " I watched this video till the end "
@vladimirhodan7360 Жыл бұрын
Wouldnt be better initialize more node workers with less libuv threads to better utilization of processor for parallel requests processing priority?
@abhishekvishwakarma9045 2 жыл бұрын
Great content as always ✌🔥
@Atif1702 2 жыл бұрын
who will be placing the requests in thread pool to cores? Thread Pool or Scheduler? Because in the diagram you made, it shows that thread pool is putting it on cores.
@bhavinpatel1425 2 жыл бұрын
As 1 request take 1 second for process + 1 second for callback = total 2 second. What about 500 request, for this example as we have 4 thread OS. What is total time to complete the execution for 500 request? Could you please assist for this? Thank you.
@fullStackInKannada Жыл бұрын
Nice, thank you!
@munishthakur8018 2 жыл бұрын
Wonderful Explanation!
@firdousbhat123 2 жыл бұрын
We have now async in python as well. FastAPI works somewhat similar to the Node js.
@devab1142 Жыл бұрын
Thanks man ❤️
@justcurious1349 2 жыл бұрын
Really nice content man... 👌
@rohan1765 2 жыл бұрын
I watched this video till the end.
@Raj-iz9uz 2 жыл бұрын
Mehul Sir same Content Post in Hindi also here or in ur Mehul Mohan Channel it will definitely Boost both Channel's 🔥🔥🔥
@arvindshelke8889 2 жыл бұрын
I watched this video till end. Came to know about libUV👌👌
@Valhgg 2 жыл бұрын
Thank you!
@rokibDev 2 жыл бұрын
Great explanation ❤️
@Growlboy1986 2 жыл бұрын
I watched this video till the end :D
@rafarolsky7522 2 жыл бұрын
just great :) thx
@himanshulal97 2 жыл бұрын
Sir teell mee from where did u got this much in depth Concept, I must say I been working with node for two years but do not got that this deep apology that took behind the scenes 😀😀😀 sir plz 🙏 refer me some this that could connect me to that level of deepness and personally I felt something is missing and by this video I come to know that there's a lot more to learn in node 😀😀😀 plz refer some book wher u prefer to have this much deep Concept...
@HimanshuChoudhary-smartfire 2 жыл бұрын
I always watch 👀 your video till the end.
@rituparnaw Жыл бұрын
But this is about bcrypt which executes on a c++ binary. Can you please tell how do JavaScript inbuilts, like promises specifically work. Suppose there are 5 promises.... ho do these 5 promises get executed parallelly ? @codedamn
@eswarprasad9773 Жыл бұрын
All the async ops including promises get offloaded from node main thread which is basically running v8 engine. You have to understand that async ops usually involve low level tasks . If you take a network call , you have to access the network card of the hardware. all these go to the libuv thread pool which executes them just like bcrypt. Once done they come to the callback queue and event loop pushes them to main thread one by one. Also we have to remember Nodejs works by concurrency Libuv works by parallelism
@rituparnaw Жыл бұрын
thank you so much for the explaination @@eswarprasad9773
@bhumit070 2 жыл бұрын
Hey nice explaination , can you make long videos like hussein ?
@JafferAliTalks 2 жыл бұрын
I watched videos till end
@hellofriend3091 2 жыл бұрын
Please cover middleware
@programmersoham 2 жыл бұрын
I watched Till the End really informative video
@yveszavel6234 2 жыл бұрын
Watched to the end
@maacpiash 2 жыл бұрын
Node.js itself is not single-threaded. The Javascript program that we write to run on Node.js is single-threaded.
@sumer9999 2 жыл бұрын
Hey the JS main thread is still single and if that's stuck in processing your event loop would be stuck and whole application would either be stuck or crash.
@eswarprasad9773 Жыл бұрын
Thats why you never write data intensive ops on the main thread, You can spawn a worker thread for you do it and share the data with parent. If its async you anyway will pass it to libuv or web api in case of a browser
@RafaelSFTech Жыл бұрын
Nice!
@soorajs577 2 жыл бұрын
I watched full video
@ahmedhafez9951 2 жыл бұрын
Great explanation, but the background music is really annoying
@shashikantkalshetty 2 жыл бұрын
Watched till the end
@puneetsingh9678 2 жыл бұрын
I watched this video till the end
@chrisplusplus6232 2 жыл бұрын
i remember a twitter argument similar to this few weeks ago from oliverjumpertz
@DebdutBiswasOnline 2 жыл бұрын
awesome
@vmmoorthi 2 жыл бұрын
I watched till end
@muhammedladeed2280 2 жыл бұрын
i watched this video till the end
@ayushthakur8703 Жыл бұрын
great
@cloud_architector 2 жыл бұрын
Nice
@shashankkr1008 2 жыл бұрын
Watched this till the end
@user-qu1xh6me5e 2 жыл бұрын
I WATCHED THIS VIDEO TILL THE END
@donmikkodanm.olmillo8154 2 жыл бұрын
I WATCHED THIS VIDEO TILL THE END! 😊
@donmikkodanm.olmillo8154 2 жыл бұрын
so basically, the more CPU cores you have the more libUV can schedule it to each core? 16 cores = 16 hashing process it can take in parallel?
@codedamn 2 жыл бұрын
correct
@amolchourasia6180 2 жыл бұрын
I watched this video till end.
@muhammedladeed2280 2 жыл бұрын
👌👌
@himanshulal97 2 жыл бұрын
And video ends soon didn't noticed 🤣🤣🤣
@friendofzeus Жыл бұрын
I recommend you remove the background music.
@samhanna7382 2 жыл бұрын
Have some sleep tho
@Hackkit 2 жыл бұрын
What a sad face wala kidding ismail ...!!!
@bramlachat2515 2 жыл бұрын
I watched this video till the end