Load time latency

[musm]

I am not sure if there is anything to be done here

The following are my julia load times when I add Revise and Rebugger to my startup.jl file

Is there any possibility to improve load time latency ? Starting julia takes a long time with the super useful Revise and Rebugger packages added to the startup file.

> time {julia -E "2"}          # rebugger and revise
2


Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 3
Milliseconds      : 399
Ticks             : 33998218
TotalDays         : 3.93497893518519E-05
TotalHours        : 0.000944394944444444
TotalMinutes      : 0.0566636966666667
TotalSeconds      : 3.3998218
TotalMilliseconds : 3399.8218
Mus ~
> time {julia -E "2"}  # revise only
2


Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 2
Milliseconds      : 564
Ticks             : 25640815
TotalDays         : 2.9676869212963E-05
TotalHours        : 0.000712244861111111
TotalMinutes      : 0.0427346916666667
TotalSeconds      : 2.5640815
TotalMilliseconds : 2564.0815
Mus ~
> time {julia -E "2"}  # no rebugger and no revise
2


Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 0
Milliseconds      : 522
Ticks             : 5220654
TotalDays         : 6.04242361111111E-06
TotalHours        : 0.000145018166666667
TotalMinutes      : 0.00870109
TotalSeconds      : 0.5220654
TotalMilliseconds : 522.0654

[timholy]

I worked extensively to reduce the load time in Revise (timholy/Revise.jl#185, not a big PR but it took me more time than it should have to do the analysis and figure out what worked and what didn't). But I haven't investigated Rebugger. So there may be hope to reduce it somewhat. And of course Revise might be amenable to further improvement.

[timholy]

I'm looking for help here, by the way. It's not terribly hard with SnoopCompile, but it is tedious.

[timholy]

I may have made some strides here, care to try again? (JuliaLang/METADATA.jl#20303 is still pending as of this writing, and you need Revise 1.0.)

[musm]

Thanks, startup time is improved. It seems that most of the latency has been transferred and now it takes longer for the prompt/repl to show up/initialize, which is better than the previous behavior.