From 765f0183815556be357429dbc3421fcb00e0e920 Mon Sep 17 00:00:00 2001
From: Anton Afanasyev <anton.a.afanasyev@gmail.com>
Date: Tue, 16 Apr 2019 19:43:18 +0000
Subject: [PATCH] [Support][JSON] Add reserve() to json Array

Summary:
Space reservation increases json lib performance for the arrays with large number of entries.
Here is the example and discussion: https://reviews.llvm.org/D60609#1468941

Reviewers: lebedev.ri, sammccall

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60788

llvm-svn: 358520
---
 llvm/include/llvm/Support/JSON.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/include/llvm/Support/JSON.h b/llvm/include/llvm/Support/JSON.h
index e3cb95066323..b2aaf68724d6 100644
--- a/llvm/include/llvm/Support/JSON.h
+++ b/llvm/include/llvm/Support/JSON.h
@@ -179,6 +179,7 @@ public:
 
   bool empty() const { return V.empty(); }
   size_t size() const { return V.size(); }
+  void reserve(size_t S) { V.reserve(S); }
 
   void clear() { V.clear(); }
   void push_back(const Value &E) { V.push_back(E); }