From 864ffa9dadd356762192ecacd2cda65eefcdfe19 Mon Sep 17 00:00:00 2001
From: Gabriel Lafond-Thenaille <gabriel@videolabs.io>
Date: Thu, 5 Dec 2024 15:19:44 +0100
Subject: [PATCH] json: increase read buffer size on the json parser

 * Force the size of the `YY_READ_BUF_SIZE` to `1 << 22` and the size of
   `YY_BUF_SIZE` to `YY_READ_BUF_SIZE * 2`.
---
 modules/demux/json/lexicon.l | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/modules/demux/json/lexicon.l b/modules/demux/json/lexicon.l
index 5f5105474d..3a15fcf878 100644
--- a/modules/demux/json/lexicon.l
+++ b/modules/demux/json/lexicon.l
@@ -41,6 +41,13 @@
     result = (len > 0) ? len : YY_NULL; \
 }
 
+/** Forcing the size of the lexer's read buffer to speedup the json parsing */
+#define YY_READ_BUF_SIZE (1 << 18)
+#ifdef YY_BUF_SIZE
+#  undef YY_BUF_SIZE
+#endif
+#define YY_BUF_SIZE (YY_READ_BUF_SIZE * 2)
+
 %}
 
 %%