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Add code for collecting some timings #13

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Add code for collecting some timings #13

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24 changes: 20 additions & 4 deletions lib/InduceReduce.gi
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Original file line number Diff line number Diff line change
Expand Up @@ -509,7 +509,7 @@ InstallValue( IndRed , rec(
##
InstallGlobalFunction( InduceReduce,
function(GR,Opt)
local TR, RedTR, H, ccsizesH, temp, it;
local TR, RedTR, H, ccsizesH, temp, it, t, tElem, tInduce, tReduce;

TR:=IndRed.GroupTools; # get group tools and reduce tools
RedTR:=IndRed.ReduceTools;
Expand All @@ -529,27 +529,43 @@ local TR, RedTR, H, ccsizesH, temp, it;
return GR.Ir;
fi;


tElem := 0;
tInduce := 0;
tReduce := 0;
while Size(GR.Ir)<GR.k and not (GR.NumberOfPrimes=0 and GR.NumberOfCyclic=0) do
# if number of irr. characters=number of conjugacy classes,
# all irr. characters have been found.

Opt.LLLOffset:=Opt.LLLOffset-1;
# Opt.LLLOffset postpones the first LLL lattice reduction

t := NanosecondsSinceEpoch();

@ThomasBreuer ThomasBreuer Jul 25, 2025

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Just for curiosity: Why not Runtime()?

IndRed.FindElementary(GR,Opt); # find elementary subgroup

IndRed.InitElementary(GR,TR); # determine information needed about elementary subgroup

t := NanosecondsSinceEpoch() - t;
Info(InfoCTUnger + InfoTiming, 2, "InduceReduce timing for Elementary: ", t/1000000., " ms");
tElem := tElem + t;

Info(InfoCTUnger, 1, "Induce/Restrict: Trying [|Z|, |P|, k(E)] = ",
[ GR.orders[GR.IndexCyc],
GR.Elementary.n/GR.orders[GR.IndexCyc], GR.Elementary.k ]);

t := NanosecondsSinceEpoch();
IndRed.Induce(GR); # append induced characters to GR.B
t := NanosecondsSinceEpoch() - t;
Info(InfoCTUnger + InfoTiming, 2, "InduceReduce timing for Induce: ", t/1000000., " ms");
tInduce := tInduce + t;

t := NanosecondsSinceEpoch();
IndRed.Reduce(GR,RedTR,Opt); # reduce GR.B by GR.Ir and do lattice reduction
t := NanosecondsSinceEpoch() - t;
Info(InfoCTUnger + InfoTiming, 2, "InduceReduce timing for Reduce: ", t/1000000., " ms");
tReduce := tReduce + t;
od;
Info(InfoCTUnger + InfoTiming, 2, "InduceReduce total: ", (tElem + tInduce + tReduce)/1000000., " ms");
Info(InfoCTUnger + InfoTiming, 2, " Elementary: ", tElem/1000000., " ms");
Info(InfoCTUnger + InfoTiming, 2, " Induce: ", tInduce/1000000., " ms");
Info(InfoCTUnger + InfoTiming, 2, " Reduce: ", tReduce/1000000., " ms");

if Size(GR.Ir)>=GR.k then
return GR.Ir;
Expand Down