Why the model predicted so slow on ios device?

[allrightzhu]

TensorFlow.js 1.7.0
tfjs-wechat plugin 0.0.9
WeChat 7.0.12
WeChat base API 2.10.4
WeChat IDE v1.02.1911180

I tried to run blazeface model on miniprogram,but I found that it predicted very slow on ios,this is my data about predicted time:
IDE：15ms ， android(MI 6): 40ms ios(iphone 6s): 460ms

But if I runed the blazeface model on web,like safari, the predicted time was fast.

[pyu10055]

@allrightzhu can you share the wechat app for blazeface?

[allrightzhu]

@allrightzhu can you share the wechat app for blazeface?

Yes，which email can I send?

[pyu10055]

@allrightzhu can you share it here? If you prefer more secure way, you can create a private github project and add me to the project. Thanks!

[allrightzhu]

@allrightzhu can you share it here? If you prefer more secure way, you can create a private github project and add me to the project. Thanks!

Ok,I invited you.

[pyu10055]

@allrightzhu I tried your facemesh demo on iphoneXR the console output indicates around 20ms, blazeface is slower at 30ms

[allrightzhu]

@allrightzhu I tried your facemesh demo on iphoneXR the console output indicates around 20ms, blazeface is slower at 30ms

OK,maybe my iphone6s is too old,I'll try it on more devices.

[pyu10055]

@allrightzhu please let us know how did go, thanks.

[Starsky-Synlitec]

I had the similar problem.
On Android device, it runs fast, but it can not recieve any message from the UI.
On Iphone device, it runs slow, but it can recieve message from UI like button.

[Starsky-Synlitec]

@pyu10055 I also invited you to my project, you can check it out.

[smallSix6]

怎么我的代码代码运行报错啊，报错如下：
VM1948:1 MiniProgramError
module "miniprogram_npm/@tensorflow/tfjs-backend-wasm/path" is not defined
Error: module "miniprogram_npm/@tensorflow/tfjs-backend-wasm/path" is not defined
at require (http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2032908)
at http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2032529
at REQUIRE (http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:25:34)
at http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:5959:12
at Object.func (http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:102:32)
at REQUIRE (http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:48:23)
at http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:5962:10
at http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:5963:2
at require (http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2033046)
at http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2032529
有人遇到过吗？

[smallSix6]

@allrightzhu您可以在这里分享吗？如果您希望使用更安全的方式，则可以创建一个私有github项目并将我添加到该项目中。谢谢！

好吧，我邀请你。

@allrightzhu can you share it here? If you prefer more secure way, you can create a private github project and add me to the project. Thanks!

Ok,I invited you.

Can you add me to the project too? Thanks!

[pyu10055]

怎么我的代码代码运行报错啊，报错如下：
VM1948:1 MiniProgramError
module "miniprogram_npm/@tensorflow/tfjs-backend-wasm/path" is not defined
Error: module "miniprogram_npm/@tensorflow/tfjs-backend-wasm/path" is not defined
at require (http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2032908)
at http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2032529
at REQUIRE (http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:25:34)
at http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:5959:12
at Object.func (http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:102:32)
at REQUIRE (http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:48:23)
at http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:5962:10
at http://127.0.0.1:42868/appservice/miniprogram_npm/@tensorflow/tfjs-backend-wasm/index.js:5963:2
at require (http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2033046)
at http://127.0.0.1:42868/appservice/__dev__/WAService.js:2:2032529
有人遇到过吗？

@smallSix6, for WASM backend, you need to use 2.0.0 version of tfjs-wasm and tfjs-core, tfjs-converter, please take a look at the readme file for details.

[GaussRieman]

Maybe it's not due to tfjs, instead the camera frame difference between iphone and android should be blamed for this. Note that the camera frame resolution on android is a constant 384288, while on iphone, as instruction says, it varies from 480p to 1080p, and 720p (1080720) as default.

One useful way to improve is setting the camera resolution low in camera label.

Hope it's helpful.

[1161735054]

@allrightzhu can you share it here? If you prefer more secure way, you can create a private github project and add me to the project. Thanks!

Ok,I invited you.

I am doing a similar project with you,can you please show me your code too?

[anthann]

JSCore on iOS has no jit. So that in many scenarios V8 on Android is outperformed. Not sure if it's related to this case.

[tenderzada]

@allrightzhu您可以在这里分享吗？如果您希望使用更安全的方式，则可以创建一个私有github项目并将我添加到该项目中。谢谢！

好吧，我邀请你。

@allrightzhu can you share it here? If you prefer more secure way, you can create a private github project and add me to the project. Thanks!

Ok,I invited you.

Can you add me to the project too? Thanks!

Can you add me to the project too? Thanks!

[aizigao]

ios mini program run in jsCore without jit
小程序开启 useExperimentalWorker 可以开启JIT 然后运行wasm 的效率就和安卓差不多了，但是用了 useExperimentalWorker 就不能用 wx.createSharedArrayBuffer 创建共享内存了 传输数据时非常耗资源