[PATCH] D93531: [clangd] Reuse buffer for JSONTransport::readRawMessage

[Nathan James via Phabricator via cfe-commits]

njames93 updated this revision to Diff 312930.
njames93 added a comment.

Remove input buffers, but keep output as its easy to reason about.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D93531/new/

https://reviews.llvm.org/D93531

Files:
  clang-tools-extra/clangd/JSONTransport.cpp


Index: clang-tools-extra/clangd/JSONTransport.cpp
===================================================================
--- clang-tools-extra/clangd/JSONTransport.cpp
+++ clang-tools-extra/clangd/JSONTransport.cpp
@@ -126,13 +126,13 @@
   bool handleMessage(llvm::json::Value Message, MessageHandler &Handler);
   // Writes outgoing message to Out stream.
   void sendMessage(llvm::json::Value Message) {
-    std::string S;
-    llvm::raw_string_ostream OS(S);
+    OutputBuffer.clear();
+    llvm::raw_svector_ostream OS(OutputBuffer);
     OS << llvm::formatv(Pretty ? "{0:2}" : "{0}", Message);
-    OS.flush();
-    Out << "Content-Length: " << S.size() << "\r\n\r\n" << S;
+    Out << "Content-Length: " << OutputBuffer.size() << "\r\n\r\n"
+        << OutputBuffer;
     Out.flush();
-    vlog(">>> {0}\n", S);
+    vlog(">>> {0}\n", OutputBuffer);
   }
 
   // Read raw string messages from input stream.
@@ -143,6 +143,7 @@
   llvm::Optional<std::string> readDelimitedMessage();
   llvm::Optional<std::string> readStandardMessage();
 
+  llvm::SmallVector<char, 0> OutputBuffer;
   std::FILE *In;
   llvm::raw_ostream &Out;
   llvm::raw_ostream &InMirror;


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