Minor optimisation

lib/Epub/Epub/Page.cpp

@@ -88,6 +88,7 @@ std::unique_ptr<Page> Page::deserialize(FsFile& file) {
   uint16_t count;
   serialization::readPod(file, count);
 
+  page->elements.reserve(count);
   for (uint16_t i = 0; i < count; i++) {
     uint8_t tag;
     serialization::readPod(file, tag);