[Dev] Check GPU runtime measurement

[jbcaillau]

check that

• two runs (first to precompile)
• CUDA.@time on second

[ocots]

@jbcaillau

CTBenchmarks.jl/src/utils.jl

Lines 229 to 239 in 122d95d

	# Use CUDA.@timed for GPU benchmarking
	madnlp(nlp_model_oc; opt...) # run for warmup
	ITERATION[] = 0
	bt = CUDA.@timed begin
	ITERATION[] += 1
	if ITERATION[] == 2
	opt[:print_level] = set_print_level(solver, false)
	end
	madnlp(nlp_model_oc; opt...)
	end
	bt_nlp_sol = bt.value