From a84586b61f8cd89d7d7b8c16496de25a1bac8e32 Mon Sep 17 00:00:00 2001
From: Vladimir Mandic <mandic00@live.com>
Date: Fri, 16 Apr 2021 08:34:09 -0400
Subject: [PATCH] added node-multiprocess demo

---
 Demos.md | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/Demos.md b/Demos.md
index 72fe68d..c049711 100644
--- a/Demos.md
+++ b/Demos.md
@@ -188,3 +188,51 @@ node demo/node.js
 2021-03-06 10:28:54 DATA:  Gesture: [ { body: 0, gesture: 'leaning right' }, [length]: 1 ]
 10:28:54.968 Human: Warmup full 621 ms
 ```
+
+## NodeJS Multi-process Demo
+
+- `node-multiprocess.js` and `node-multiprocess-worker.js`: Demo using NodeJS with CommonJS module  
+  Demo that starts n child worker processes for parallel execution
+
+```shell
+node node-multiprocess.js
+```
+
+```json
+2021-04-16 08:33:13 INFO:  @vladmandic/face-api version 1.1.12
+2021-04-16 08:33:13 INFO:  User: vlado Platform: linux Arch: x64 Node: v15.7.0
+2021-04-16 08:33:13 INFO:  FaceAPI multi-process test
+2021-04-16 08:33:13 STATE: Main: started worker: 268453
+2021-04-16 08:33:13 STATE: Main: started worker: 268459
+2021-04-16 08:33:13 STATE: Main: started worker: 268460
+2021-04-16 08:33:13 STATE: Main: started worker: 268466
+2021-04-16 08:33:14 STATE: Worker: PID: 268459 TensorFlow/JS 3.4.0 FaceAPI 1.1.12 Backend: tensorflow
+2021-04-16 08:33:14 STATE: Worker: PID: 268466 TensorFlow/JS 3.4.0 FaceAPI 1.1.12 Backend: tensorflow
+2021-04-16 08:33:14 STATE: Worker: PID: 268460 TensorFlow/JS 3.4.0 FaceAPI 1.1.12 Backend: tensorflow
+2021-04-16 08:33:14 STATE: Worker: PID: 268453 TensorFlow/JS 3.4.0 FaceAPI 1.1.12 Backend: tensorflow
+2021-04-16 08:33:15 STATE: Main: dispatching to worker: 268466
+2021-04-16 08:33:15 STATE: Main: dispatching to worker: 268460
+2021-04-16 08:33:15 INFO:  Latency: worker initializtion:  1860 message round trip: 39
+2021-04-16 08:33:15 DATA:  Worker received message: 268466 { test: true }
+2021-04-16 08:33:15 STATE: Main: dispatching to worker: 268459
+2021-04-16 08:33:15 STATE: Main: dispatching to worker: 268453
+2021-04-16 08:33:15 DATA:  Worker received message: 268460 { image: 'demo/sample2.jpg' }
+2021-04-16 08:33:15 DATA:  Worker received message: 268459 { image: 'demo/sample3.jpg' }
+2021-04-16 08:33:15 DATA:  Worker received message: 268453 { image: 'demo/sample4.jpg' }
+2021-04-16 08:33:15 DATA:  Worker received message: 268466 { image: 'demo/sample1.jpg' }
+2021-04-16 08:33:17 DATA:  Main: worker finished: 268466 detected faces: 3
+2021-04-16 08:33:17 STATE: Main: dispatching to worker: 268466
+2021-04-16 08:33:17 DATA:  Main: worker finished: 268460 detected faces: 3
+2021-04-16 08:33:17 STATE: Main: dispatching to worker: 268460
+2021-04-16 08:33:17 DATA:  Worker received message: 268466 { image: 'demo/sample5.jpg' }
+2021-04-16 08:33:17 DATA:  Worker received message: 268460 { image: 'demo/sample6.jpg' }
+2021-04-16 08:33:17 DATA:  Main: worker finished: 268453 detected faces: 4
+2021-04-16 08:33:17 STATE: Main: worker exit: 268453 0
+2021-04-16 08:33:17 DATA:  Main: worker finished: 268459 detected faces: 3
+2021-04-16 08:33:17 STATE: Main: worker exit: 268459 0
+2021-04-16 08:33:18 DATA:  Main: worker finished: 268466 detected faces: 5
+2021-04-16 08:33:18 STATE: Main: worker exit: 268466 0
+2021-04-16 08:33:18 DATA:  Main: worker finished: 268460 detected faces: 4
+2021-04-16 08:33:18 INFO:  Processed: 6 images in total: 4930 ms working: 3069 ms average: 511 ms
+2021-04-16 08:33:18 STATE: Main: worker exit: 268460 0
+```