improving compile times

[yakra]

for o in $(find . -name \*.o); do
  rm $o;
  printf "%s\t$o\n" $(2>&1 time -f %e make $o > /dev/null);
done

• won't do much but Don't #include <fstream> or <iostream> in headers. #291

fmt (mostly)

• Try #include <fmt/core.h> rather than #include <fmt/format.h>
• Redundancy in tmg edge line computation #286
• Comment out HGEdge::intermediate_point_string()
• maybe use snprintf for low-impact functions?
  • GraphListEntry::tag()
  • ElapsedTime::et()
• HighwayGraph.cpp
  • Separate out ST/MT, fmt bits
  • Create HGVertex::tmg_line?
• Route::write_nmp_merged(): combine adjacent calls into one?
• read_wpt.cpp
  move fmt functionality out:
  • Datacheck::add_long_segment
  • Datacheck::add_sharp_angle
• Waypoint::nmplogs: combine adjacent calls into one?
• WaypointQuadtree.cpp
  • Separate out ST/MT, fmt bits
  • Datacheck::add_duplicate_coords
  • confirm WaypointQuadtree::str() usused; comment out
• allbyregionactive*
  • lose the ifdef
  • combine into one function via pointer-to-member?
• sql_file:
  • an "sqleton" to handle the ST/MT printouts, calling functions for each table
  • compile table functions separately to minimize dependencies?
    OTOH, this may be outweighed by the overhead of fmt. fmt & non-fmt translation units?
• rdstats: lol combine adjacent calls?

ST/MT

TBD. Haven't looked into this much yet.