From 0d5d353e999be50de1c64ecfa6603bf48615b5f5 Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Sat, 17 Sep 2022 17:10:23 +0200
Subject: [PATCH] read LittleFS.totalBytes only once on start

---
 lib/framework/SystemStatus.cpp | 2 +-
 src/system.cpp                 | 3 ++-
 src/system.h                   | 7 +++++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/framework/SystemStatus.cpp b/lib/framework/SystemStatus.cpp
index baf933050..c9f810382 100644
--- a/lib/framework/SystemStatus.cpp
+++ b/lib/framework/SystemStatus.cpp
@@ -24,7 +24,7 @@ void SystemStatus::systemStatus(AsyncWebServerRequest * request) {
     root["flash_chip_size"]      = ESP.getFlashChipSize();
     root["flash_chip_speed"]     = ESP.getFlashChipSpeed();
 
-    root["fs_total"] = LittleFS.totalBytes();
+    root["fs_total"] = emsesp::EMSESP::system_.FStotal();
     root["fs_used"]  = LittleFS.usedBytes();
     root["uptime"]   = uuid::log::format_timestamp_ms(uuid::get_uptime_ms(), 3);
 
diff --git a/src/system.cpp b/src/system.cpp
index 98c230298..1dc87f4b6 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -373,6 +373,7 @@ void System::start() {
     if (low_clock_) {
         setCpuFrequencyMhz(160);
     }
+    fstotal_ = LittleFS.totalBytes(); // read only once, it takes 500 ms to read
 #endif
 
     EMSESP::esp8266React.getNetworkSettingsService()->read([&](NetworkSettings & networkSettings) {
@@ -784,7 +785,7 @@ void System::show_system(uuid::console::Shell & shell) {
     shell.printfln(F(" SDK version: %s"), ESP.getSdkVersion());
     shell.printfln(F(" CPU frequency: %lu MHz"), ESP.getCpuFreqMHz());
     shell.printfln(F(" Free heap: %lu bytes"), (uint32_t)ESP.getFreeHeap());
-    shell.printfln(F(" FS used/total: %lu/%lu (bytes)"), LittleFS.usedBytes(), LittleFS.totalBytes());
+    shell.printfln(F(" FS used/total: %lu/%lu (bytes)"), LittleFS.usedBytes(), FStotal());
     shell.println();
 
     shell.println("Network:");
diff --git a/src/system.h b/src/system.h
index c8a90ba24..e0a0340b8 100644
--- a/src/system.h
+++ b/src/system.h
@@ -220,6 +220,10 @@ class System {
     void wifi_reconnect();
     void show_users(uuid::console::Shell & shell);
 
+    uint32_t FStotal() {
+        return fstotal_;
+    }
+
   private:
     static uuid::log::Logger logger_;
     static bool              restart_requested_;
@@ -293,6 +297,9 @@ class System {
     int8_t  eth_power_;
     uint8_t eth_phy_addr_;
     uint8_t eth_clock_mode_;
+
+    uint32_t fstotal_;
+
 };
 
 } // namespace emsesp