Activation time is too slow

[mtxr]

Take a look..

• Extension Name: rest-client
• Extension Version: 0.19.1
• OS Version: Linux x64 4.4.0-134-generic
• VSCode version: 1.28.0-insider

We have written the needed data into your clipboard. Please paste:

[Huachao]

@mtxr what is the size of your http file, and does the extension activated very slow when you open the http file each time, like what's the delay from opening the file and seeing the Send Request text?

[mtxr]

I don't remember exactly which file I opened that took 36k ms, but I opened a file like this one below 5 times, activation time was always around 13,5k ms.

@url = *********
@username = ********
@password = *******

###
# @name login
POST {{url}}/auth/password HTTP/1.1
Accept: application/json, text/plain, */*
Content-Type: application/json

{
  "username":"********",
  "password":"**********"
}

###
# @name query
POST {{url}}/application/query HTTP/1.1
Accept: application/json, text/plain, */*
Content-Type: application/json
Authorization: Bearer {{login.response.body.$.data.id}}

{JSON DATA}

[Huachao]

@mtxr Sorry for the late reply, I'd like to share with you some progress on this issue. I tested your http file, the average activation time was around 5s. Althought the time seems much smaller than yours, I also think this is a bit unacceptable. I dive into my code, and add some measuring code. I found that the most time-cosing steps are require some 3rd party packages on startup, like request, highlight.js and adal-node, as weel as some global initializtion work like preparing the telemetry client. So I have some ideas about this perf issue:

1. Defer some packages to be loaded to the actual required time (using techniques like dynamic import)
2. Make the required 3rd party packages in a small list
3. Put some global objects initialization tasks to runtime

[pke]

so disabling telemetry (which should be a good citizen and be OFF by default btw) could already improve the performance now?

[Huachao]

@mtxr @pke I have used the Webpack technique in my extension, and it decreases the activation time to less than 1.5s.

[Huachao]

@mtxr @pke you can try the latest version 0.21.0 to verify this performance issue fix.

[pke]

@Huachao how can I get the performance starts for extensions?

[Huachao]

@pke maybe a built-in command named like Show Running Extensions of VSCode

[pke]

@Huachao 642ms now. Well done!

[mtxr]

@Huachao thank you very much! Great job!