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[ld2412] Batch UART reads to reduce loop overhead

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Read all available bytes in batches via read_array() instead of
byte-at-a-time read() calls. Each read() internally chains through
read_byte -> read_array(1) -> check_read_timeout_ -> available(),
resulting in 3 UART calls per byte. Batching reduces this
significantly.
This commit is contained in:
J. Nick Koston
2026-02-06 23:36:01 +01:00
parent 86f91eed2f
commit 6d1281301f
1 changed files with 17 additions and 2 deletions
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19
esphome/components/ld2412/ld2412.cpp
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@@ -310,8 +310,23 @@ void LD2412Component::restart_and_read_all_info() {
} }
void LD2412Component::loop() { void LD2412Component::loop() {
while (this->available()) { int avail = this->available();
this->readline_(this->read()); if (avail == 0) {
return;
}
// Read all available bytes in batches to reduce UART call overhead.
uint8_t buf[MAX_LINE_LENGTH];
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->readline_(buf[i]);
}
} }
} }