It seems to be more efficient in a small test.
Time measured in nanoseconds in a loop (3x).

(postvis.trajectories)  readTextFile:   139179300
(postvis.trajectories)  readTextFile2:   52790478 <-- new
(test_postvis.scenario) readTextFile3:    4355102
(test_postvis.scenario) readTextFile4:    1037918 <-- new
---------------------------------------------------------
(postvis.trajectories)  readTextFile:    37730947
(postvis.trajectories)  readTextFile2:    7910077 <-- new
(test_postvis.scenario) readTextFile3:    6125829
(test_postvis.scenario) readTextFile4:     484034 <-- new
---------------------------------------------------------
(postvis.trajectories)  readTextFile:    22605907
(postvis.trajectories)  readTextFile2:    6541635 <-- new
(test_postvis.scenario) readTextFile3:     688422
(test_postvis.scenario) readTextFile4:     415274 <-- new
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