Before creating new Spreadsheet::ParseExcel and parsing file:
             total       used       free     shared    buffers     cached
Mem:          3011        345       2666          0          4        185
-/+ buffers/cache:        154       2857
Swap:          956        182        774
Killed

##</code><code>##

[10998050.203177] Out of memory: Kill process 32189 (testinterfaces.) score 676 or sacrifice child
[10998050.203180] Killed process 32189 (testinterfaces.) total-vm:2893916kB, anon-rss:1958024kB, file-rss:0kB