write_master_tmg

[yakra]

#185 combined writing simple & collapsed graphs into a single function.
With the introduction of traveled format graphs, this function now handles all three formats.

Similarly combining the three master graphs into a single function could save us a wee bit of time, and simplify the code.

[yakra]

Functions for vertex & edge counts can be consolidated, for a (tiny) bit of time savings.

Matching edge functions can probably also be consolidated, to squeeze a little more efficiency out of subgraph generation. <--This should be its own issue.

[yakra]

#236 takes care of the OP.

Functions for vertex & edge counts can be consolidated, for a (tiny) bit of time savings.

Still on the to-do list. Leaving this issue open.

[yakra]

I didn't like the way the multithreaded C++ siteupdate.log was affected in #238, so I redid things.

epoch:

HighwayData @ ee4a688eff41329fd02a5823feac2cfc1227fac2
UserData @ 1377e062d3d3990bea11ed5ed63ee7bf4f4fe66b

• Python: 29.7 -> 27.5 s, an 8% speedup
• C++: 11.45 -> 9.4 s, a 21.8% speedup

noreaster:

HighwayData @ 1d043ba5c2717ee3b451e71320945f7aa4c8e6c4
UserData @ 83a47aee090102cd598b385d8174fd9ed4513415

• Python: 22.9 -> 21.2 s, an 8% speedup
• C++: not tested (yet?)

A little more testing on BiggaTomato to ensure multithreaded still looks OK, and then a pull request.