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Clear[unitize, pick, n, data] RandomSeed[1]; n = -1; data = RandomChoice[Range[0, 10], {10^710^8, 3}]; AbsoluteTiming[Pick[data, Unitize@data[[All, n]], 1] // Length] unitize[x_] := unitize[x] = Unitize[x] pick[xs_, sel_, patt_] := pick[xs] = Pick[xs, sel, patt] AbsoluteTiming[pick[data, unitize@data[[All, n]], 1] // Length] Out:
{07.5211713081, 909064190913401} {05.45802887919, 909064190913401} In:
Clear[unitize, pick, n, data] RandomSeed[1]; n = -1; data = RandomChoice[Range[0, 10], {10^7, 3}]; AbsoluteTiming[Pick[data, Unitize@data[[All, n]], 1] // Length] unitize[x_] := unitize[x] = Unitize[x] pick[xs_, sel_, patt_] := pick[xs] = Pick[xs, sel, patt] AbsoluteTiming[pick[data, unitize@data[[All, n]], 1] // Length] Out:
{0.521171, 9090641} {0.458028, 9090641} In:
Clear[unitize, pick, n, data] RandomSeed[1]; n = -1; data = RandomChoice[Range[0, 10], {10^8, 3}]; AbsoluteTiming[Pick[data, Unitize@data[[All, n]], 1] // Length] unitize[x_] := unitize[x] = Unitize[x] pick[xs_, sel_, patt_] := pick[xs] = Pick[xs, sel, patt] AbsoluteTiming[pick[data, unitize@data[[All, n]], 1] // Length] Out:
{7.3081, 90913401} {5.87919, 90913401} In:
Clear[unitize, pick, n, data] RandomSeed[1]; n = -1; data = RandomChoice[Range[0, 1, 0.5]10], {10^610^7, 103}]; data AbsoluteTiming[Pick[data, Unitize@data[[All, n]], 1] // Select[!Length] unitize[x_] AnyTrue[#:= unitize[x] = Unitize[x] pick[xs_, #sel_, ==patt_] := pick[xs] = Pick[xs, sel, patt] AbsoluteTiming[pick[data, unitize@data[[All, n]], 1] // Length] Out:
{0.521171, &]9090641} {0.458028, &]9090641} data = RandomChoice[Range[0, 1, 0.5], {10^6, 10}]; data // Select[! AnyTrue[#, # == 0 &] &] In:
Clear[unitize, pick, n, data] RandomSeed[1]; n = -1; data = RandomChoice[Range[0, 10], {10^7, 3}]; AbsoluteTiming[Pick[data, Unitize@data[[All, n]], 1] // Length] unitize[x_] := unitize[x] = Unitize[x] pick[xs_, sel_, patt_] := pick[xs] = Pick[xs, sel, patt] AbsoluteTiming[pick[data, unitize@data[[All, n]], 1] // Length] Out:
{0.521171, 9090641} {0.458028, 9090641}