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
@@ -44,6 +44,7 @@ class Epub {
  }
  ~Epub() = default;
  std::string& getBasePath() { return contentBasePath; }
+  // MEMFIX-PORT: epub resident-bytes audit accessor; portable
  // Approximate resident heap of the open book (audit): path strings, the CSS
  // file list, and the parsed stylesheet. BookMetadataCache is file-backed
  // (counts + HalFile handles) and contributes little.