From 422fdb134aba662ec9c29b7227915cc0ae3956f8 Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Sun, 27 Oct 2024 19:02:05 +0100
Subject: [PATCH] usre faster math for _S builds

similar to -ffast-math, but still supports NaN and infinites (needed for sunrise/sunset calculations)

10%-20% faster on -S3
---
 platformio.ini | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 367b85cb..9cc3b3d7 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -1270,7 +1270,9 @@ build_flags =
 build_flags =
   -O2 ;; optimize for performance instead of size
   ;-ffast-math ;; gives a few  (2-5) percent speedup on ESP32-S3, but causes slight slowdown on classic ESP32
-  -mtarget-align -free -fipa-pta ;; these are very useful, too
+  -funsafe-math-optimizations -fsingle-precision-constant ;; less dangerous than -ffast-math; still allows the compiler to exploit FMA and reciprocals  (10% faster on -S3)
+  ;; -mtarget-align ;; this one is included in -O2, so its not necessary to explicitly add it
+  -free -fipa-pta ;; these are very useful, too
   -fno-jump-tables -fno-tree-switch-conversion                 ;; needed
   -freorder-blocks -Wwrite-strings -fstrict-volatile-bitfields ;; needed
 build_unflags =