Procedure Calls testing  with MT as PRNG; Max = 16777216
D1; 3 procs, mod 3 calls both, one or the other of the 2; NO serpent calls; X final gives the total number of calls.
NB: as MT is used, X final is repeatable between runs (same seed).
Intel i5 3.2GHz, 4GB RAM
Adacore's 2016 GNAT;
Seeding of MT: 16#111#, 16#222#, 16#333#, 16#444#  -> X = 22368144

Handlers | ZCX (s)  | SJLJ (s)
0        | 0.896    | 0.882
0        | 0.905    | 0.906
1        | 1.058    | 184.516
1        | 1.064    | 265.339
2        | 1.215    | 372.574
3        | 1.329    | 446.821