[SR-12972] SourceLocationConverter initializer that accepts a SourceFileSyntax is slower than the String version about swift-syntax HOT 3 CLOSED

import SwiftSyntax
import SwiftParser
import Foundation

let str = try! String(contentsOfFile: "/Users/alex/Downloads/SR-12972/SyntaxBuilders.swift")

let tree = try! Parser.parse(source: str)

// Warm up caches
for _ in 0..<10 {
  _ = SourceLocationConverter(file: "", source: str)
}
for _ in 0..<10 {
  _ = SourceLocationConverter(file: "", tree: tree)
}

do {
  let start = Date()
  for _ in 0..<100 {
    _ = SourceLocationConverter(file: "", source: str)
  }
  print("String based initializer took: \(Date().timeIntervalSince(start)/100 * 1000) ms")
}

do {
  let start = Date()
  for _ in 0..<100 {
    _ = SourceLocationConverter(file: "", tree: tree)
  }
  print("Tree-based initializer took: \(Date().timeIntervalSince(start)/100 * 1000) ms")
}