BartyCrouch runs much slower with Xcode 10.2

[fredpi]

Since the update to Xcode 10.2, it feels like BartyCrouch runs much slower than previously.

Times like this happen on every build of a project where BartyCrouch once didn't noticeably delay builds with Xcode 10.1:

• Task 'Update Interfaces' took 3.45 seconds.
• Task 'Code Transform' took 11.587 seconds.
• Task 'Normalize' took 22.055 seconds.
• Task 'Lint' took 22.768 seconds.

Make BartyCrouch fast again! 🥇

[Jeehut]

Thanks @fredpi for reporting this. I will investigate shortly, I didn't notice any slowdowns in BartyCrouch and the reported times are definitely a no-go. Could you please tell me how exactly you installed BartyCrouch? Did you use brew install/upgrade bartycrouch? Swift code optimizations may play an important role regarding performance ...

[fredpi]

@Dschee Thanks for looking into this.

I installed BartyCrouch via brew install and recently upgraded to version 4.0.1 via brew upgrade.

[donnellyk]

In trying to upgrade to BartyCrouch 4.0, we also saw some slowdown in Xcode 10.2

kevin-3:ios [kd/string_test]$bartycrouch update -v
Starting Task 'Update Code' ...
2019-04-11 12:16:50.048: ℹ️  Incrementally updated keys of file '/Users/kevin/git/ios/Foo/de.lproj/Localizable.strings'.
2019-04-11 12:17:00.398: ℹ️  Incrementally updated keys of file '/Users/kevin/git/ios/Foo/ja.lproj/Localizable.strings'.
2019-04-11 12:17:09.753: ℹ️  Incrementally updated keys of file '/Users/kevin/git/ios/Foo/en.lproj/Localizable.strings'.
2019-04-11 12:17:19.280: ℹ️  Incrementally updated keys of file '/Users/kevin/git/ios/Foo/es.lproj/Localizable.strings'.
2019-04-11 12:17:28.730: ℹ️  Incrementally updated keys of file '/Users/kevin/git/ios/Foo/fr.lproj/Localizable.strings'.
2019-04-11 12:17:38.425: ✅  ./Foo:  Successfully updated strings file(s) of Code files.
Task 'Update Code' took 66.402 seconds.

I believe the previous version we were on, 3.something (kinda old) was in the range of 5 seconds. We have a pretty big project, something in the order of 1500 swift files and our localizable strings files are ~3000 lines.

Looks like most of the time is spent writing the files?

Installed via brew, 4.0.1

[fredpi]

Today, I investigated a bit about this issue and found out that while the following line performs quickly, times add up so that it accounts for an estimated 80 - 90 % of the run times.

https://github.com/Flinesoft/BartyCrouch/blob/b16ee0255908b9d0bf27b76126d42112b472a717/Sources/BartyCrouchKit/FileHandling/StringsFileUpdater.swift#L346

The .count at the end doesn't do much harm; .prefix is about 2,5x fast than .components. I've tried multiple approaches to make things faster but didn't come up with something relevant yet. As for the components().count: We could use .filter { $0 == "\n" }, but that still leaves the .prefix...

[fredpi]

Here are two approaches, that don't make things faster:

var idx = string.startIndex
var line: Int = 0
while idx < string.index(string.startIndex, offsetBy: valueRange.location) {
    if string[idx] == "\n" { line += 1 }
    string.formIndex(after: &idx)
}

var line: Int = 1
for index in 0 ..< string.count {
    if index >= valueRange.location { break }
    if string[string.index(string.startIndex, offsetBy: index)] == "\n" {
        line += 1
     }
}

[fredpi]

I just did another measurement by removing the heavy line calculation and found out that 'Normalize' only took 0.373 sec (compared to ~22 sec previously). If we can't find a solution to make the calculation much faster, maybe there should be an option not to calculate the line...

[Kondamon]

This fix doesn't work for me. I still get Task 'Code Transform' took 21.23 seconds with BartyCrouch 4.0.2, same as @fredpi.

[Jeehut]

@Kondamon Is the normalize task slow for you, too?

[Kondamon]

@Kondamon Is the normalize task slow for you, too? No, the normalize task finishes extremly fast without any delay (<0.1 sec). I don't even receive a message for how long it took in the console.

[Jeehut]

Okay, in that case, could you please open a new issue specifically stating that the code transform task is slow for you? Also could you provide your configuration file contents and Xcode, macOS and BartyCrouch versions there? Additionally, a guess about how many files or code lines your project contains would be helpful, too.