I am new to Node-RED. I found that all javascript codes written in the node are processed in sequence in a flow (even using async function like setTimeout etc). This is also the same case among flows. Is Node-RED single threaded? Is there any setting to make Node-RED multiple threaded? If Node-RED…

The sleep function you have created stops node.js from doing anything else: function sleep(millis) { var date = new Date(); var curDate = null; do { curDate = new Date(); } while(curDate-date < millis); } This is because it is entirely synchronous code - it never gives control back to the node…

[image] knolleary: Also please read the post @ukmoose linked to - I had to manually repair your flow before I could import it to look. This comes up a lot, I certainly fell into the first time I tried to post a sample. I'm wondering why this forum doesn't have a "code" tag to use when pastin…

Rather than backticks, the other option is to use the code block format which achieves the same thing. It's right there in the toolbar and yet still gets ignored. [Can_node-red_node_flow_run_in_parallel__-General-_Node-RED_Forum] The disadvantage of that button is that it indents your content by 4…

I tried that, it didn't seem to work I'll try again: [ { "id": "6d1d25e2.4e534c", "type": "mqtt in", "z": "6d590249.a8763c", "name": "Garage Door Alert", "topic": "Alarm/GarageDoorAlert", "qos": "1", "broker": "fd073680.473468", "x": 130, "y": 1560, "wires": [ [ "b2d4636f.2287c" ] ] …

[image] wb666greene: Might I suggest changing the the "tool tip" to be "code insertion" or something even clearer? I'm sure you could suggest it to discourse who produce the forum software.

Thanks for the reply. I was just trying to evaluate Node-Red's behavior. sleep was not a thing that I wanted to do. Instead I tried to simulate the scenario that a "function node" needs to process a lot of logic using javascript and I found that will stop other flows (even using setTimeout, it can …

Thanks for the guide. I just modified and hope this time I made it right.

I am aware that if I add a delay node, it will help me to let other node process first. But it seems it still won't allow actual javascript code to be processed in parallel.

[image] fangzhu: But it seems it still won't allow actual javascript code to be processed in parallel. Not sure what you mean by this. A Delay node will not stop other nodes running while it is delaying. Also setTimeout will provide the same feature inside a function node.

Can node-red node/flow run in parallel?

General

GiovanniG 7 February 2019 22:13 10

I suggest you to use the delay module in Node Red. Remember you can reset the message inside (in means after the delay will not be output) by sending an object containing only reset:1
I use only this on my flows, it saves me from code troubles

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Can node-red node/flow run in parallel?

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