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[Octave-bug-tracker] [bug #51512] of-io: Missing or wrong types when usi

From: Markus Mützel
Subject: [Octave-bug-tracker] [bug #51512] of-io: Missing or wrong types when using xlsread with OCT interface
Date: Mon, 24 Jul 2017 16:54:54 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0

Follow-up Comment #8, bug #51512 (project octave):


I timed different variations of the patch while reading the attached file with
roughly 1000x1000 cells.
With the current version of __OCT_xlsx2oct__.m: 79.3s
With the "cellfun patch" from comment #1: 108.5s
With a dedicated regexp for reading Booleans (patch attached to this comment):

However, most of the additional time is spend reading the strings that the
current version skips. Without that particular change (optional s-tag), the
time reduced to: 79.2s.

So there is hardly any reduction in speed (if any at all), when taking the
number of cells into account that are read as non-empty.

(file #41322)

Additional Item Attachment:

File name: bug51512_xlsx2oct_types_v2.patch Size:6 KB


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