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Benchmark: timing 1000000 iterations of defined, exists... defined: 21 wallclock secs (21.36 usr + 0.00 sys = 21.36 CPU) exists: 19 wallclock secs (18.45 usr + 0.00 sys = 18.45 CPU)
# %hash is a hash with values for one/two/tre/for ... 1 if exists $hash{xyx}; } ...