[Tool] Comment on the memory efficiency on fabric bitstream address storage
@@ -207,6 +207,10 @@ class FabricBitstream {
* to the configuration protocol directly
*
* We use a 2-element array, as we may have a BL address and a WL address
+ *
+ * TODO: use nested vector may cause large memory footprint
+ * when bitstream size increases
+ * NEED TO THINK ABOUT A COMPACT MODELING
*/
vtr::vector<FabricBitId, std::vector<char>> bit_addresses_;
vtr::vector<FabricBitId, std::vector<char>> bit_wl_addresses_;
