Logger.log extremely slow

[Ricardo de Vries]

Hi there,

I've written some scripts, and now since the new runtime engine, it seems that Logger.log() is just extremely slow. When I want to log something, it just doesn't appear in the logs. Only when I log a number or something very simple.

Anyone experiencing the same problem?

[Alan Wells]

The Apps Script people know about the issue, and there are plans to rectify that problem.  In the meantime, you can log to a spreadsheet, or to Stackdriver, or revert back to

  "runtimeVersion": "DEPRECATED_ES5"

There are various people who have created code for logging to a spreadsheet.  Depending upon your preference, you can try an alternative to Logger.log().  You can also go to your Executions in your Apps Script dashboard and see the logs through your Executions which is faster.

There are some existing posts here about the subject.  You could try doing a search.

[Andrew Roberts]

Personally I've been developing in Rhino, and then switching to V8 for production and any performance gains.

andrewroberts.net

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[Bruce Mcpherson]

I've  no evidence for this, but I suspect that v8 logger is probably using Stackdriver behind the scenes, then retrieving the result when you look at it. 

If so, you may as well use console.log (or divert Logger to console)  the logging is better anyway.

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[Adam Morris]

I'm using my library as a workaround.

https://github.com/classroomtechtools/modularLibrariesV8/blob/master/Logger/Logger.js

It also provides logging details such as stacktrace and location of Logger.log statement.

[Andrew Roberts]

I think I remember EricK confirming it was something like that.

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[Andrew Roberts]

And there is also BBLog for persistant logging to GSheet, StackDriver and/or Firebase.

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[Adam Morris]

Issue tracker here says they aren't going to fix it, marked as "infeasible"

https://issuetracker.google.com/issues/149519063

Maybe there's a new IDE on the way making it moot?

[Andrew Apell]

I think they said this is expected behaviour because it is using stackdriver or something like that, The new IDE is supposed to return it to normal.