perf: delay string.Replace call

Author: TimothyMakkison

Src/CSharpier.Cli/CommandLineFormatter.cs

@@ -228,7 +228,7 @@ CancellationToken cancellationToken
 
             async Task FormatFile(
                 string actualFilePath,
-                string originalFilePath,
+                string? originalFilePath = null,
                 bool warnForUnsupported = false
             )
             {
@@ -247,6 +247,11 @@ async Task FormatFile(
                     cancellationToken
                 );
 
+                originalFilePath ??= actualFilePath.Replace(
+                    directoryOrFilePath,
+                    originalDirectoryOrFile
+                );
+
                 if (printerOptions is { Formatter: not Formatter.Unknown })
                 {
                     printerOptions.IncludeGenerated = commandLineOptions.IncludeGenerated;
@@ -298,9 +303,7 @@ await FormatPhysicalFile(
                         "*.*",
                         SearchOption.AllDirectories
                     )
-                    .Select(o =>
-                        FormatFile(o, o.Replace(directoryOrFilePath, originalDirectoryOrFile))
-                    )
+                    .Select(o => FormatFile(o))
                     .ToArray();
                 try
                 {