From a5ee4510433c247e8eebe982ff82d587a2e303f1 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Mon, 9 Feb 2026 12:17:58 -0600
Subject: [PATCH] [tuya] Batch UART reads to reduce per-loop overhead (#13827)

---
 esphome/components/tuya/tuya.cpp | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/esphome/components/tuya/tuya.cpp b/esphome/components/tuya/tuya.cpp
index 2812fb6ad6..9ee4c09b86 100644
--- a/esphome/components/tuya/tuya.cpp
+++ b/esphome/components/tuya/tuya.cpp
@@ -31,10 +31,19 @@ void Tuya::setup() {
 }
 
 void Tuya::loop() {
-  while (this->available()) {
-    uint8_t c;
-    this->read_byte(&c);
-    this->handle_char_(c);
+  // Read all available bytes in batches to reduce UART call overhead.
+  int avail = this->available();
+  uint8_t buf[64];
+  while (avail > 0) {
+    size_t to_read = std::min(static_cast<size_t>(avail), sizeof(buf));
+    if (!this->read_array(buf, to_read)) {
+      break;
+    }
+    avail -= to_read;
+
+    for (size_t i = 0; i < to_read; i++) {
+      this->handle_char_(buf[i]);
+    }
   }
   process_command_queue_();
 }