Reduce TLS memory requirements for KOReader sync

Split heap gate into separate free-memory (50KB) and largest-block (20KB) thresholds based on field measurements. Enable wolfSSL single-precision ECC to use fixed 256-bit arrays instead of heap-allocated fast-math bignums, reducing TLS handshake memory footprint. Reclaim ~7KB by right-sizing ESP timer task stacks and move WiFi code out of IRAM to free ~25-30KB for heap. Add memory audit landmarks for font and EPUB allocations.
2026-07-14 14:53:41 -04:00
parent 02398c8a96
commit a86a644adc
16 changed files with 200 additions and 75 deletions
@@ -104,6 +104,7 @@ class SdCardFont {
    uint32_t uniqueGlyphs = 0;
    uint32_t bitmapBytes = 0;
  };
+  // MEMFIX-PORT: SD font resident-bytes audit; portable
  // Log per-style resident heap (full tables + kept-if-fits mini arenas +
  // advance tables + overflow bitmaps) and return the total in bytes. Pure
  // accounting — no allocation, no state change.