Parse Xcode tests runtime, show top 25 tests

find-slow-tests.swift

#!/usr/bin/swift

import Foundation
import RegexBuilder

var lines: [String] = []

while let line = readLine() {
    lines.append(line)
}

let regex = Regex {
    One("(")
    Capture {
        OneOrMore(.digit)
        One(".")
        OneOrMore(.digit)
    } transform: {
        return Double($0)
    }
    ZeroOrMore(.any)
    One(" seconds")
}

struct ParsedLine {
    let line: String
    let duration: TimeInterval
}

let parsedLines: [ParsedLine] = lines.compactMap { line -> ParsedLine? in
    guard let parsed = line.firstMatch(of: regex),
            let double = parsed.1 else {
        return nil
    }

    return ParsedLine(line: line, duration: double)
}

let top = parsedLines.sorted { l, r in
    return l.duration > r.duration
}.prefix(25)

print("Total lines: \(lines.count), match: \(parsedLines.count)")

print("Top 25:")

top.forEach {
    print($0.line)
}