[clang] [clang-format] Limit how much work guessLanguage() can do (PR #78925)

[via cfe-commits]

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@@ -243,6 +247,14 @@ void UnwrappedLineParser::parse() {
       Callback.consumeUnwrappedLine(Line);
     }
     Callback.finishRun();
+    TotalLinesProcessed += Lines.size();
+    if ((TotalLinesProcessed / 10000) > LastReport) {
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mydeveloperday wrote:

Do we need this verbose output?

https://github.com/llvm/llvm-project/pull/78925