How long does SysTools MBOX Converter take to convert 123,596 mails?

SysTools MBOX Converter needs between 19 minutes 35 seconds and 2 hours 21 minutes for 123,596 mails (23 GB), depending on the export format. EML finishes first, and PDF takes 53 minutes 18 seconds.

How much faster is SysTools MBOX Converter than the previous version?

SysTools MBOX Converter is 8.0 times faster at the median across the 8 formats that both versions finished. Gains range from 1.8 times for CSV to 13.4 times for EML.

Which MBOX export format finishes first?

MBOX to EML finishes first at 19 minutes 35 seconds. MBOX to JSON comes second at 21 minutes 40 seconds and MBOX to EMLX comes third at 24 minutes 5 seconds.

Did previous version finish MBOX to PDF?

Previous version stopped at 60,269 mails when the test machine restarted after 6 hours 27 minutes. SysTools MBOX Converter finished PDF in 53 minutes 18 seconds.

Which MBOX source did you use for the MBOX Converter tests?

Tests of SysTools MBOX Converter used an MBOX source with 123,596 mails and 23 GB.

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SysTools MBOX Converter Performance Comparison

SysTools MBOX Converter exported a 23 GB MBOX file with 123,596 mails to EML in 19 minutes 35 seconds. Previous version needed 4 hours 23 minutes for the same job.

Previous version finished 8 of the 9 formats it tested, and SysTools MBOX Converter beat it in all 8 with a median gain of 8.0 times. Exports take from 19 minutes 35 seconds for EML to 2 hours 21 minutes for CSV.

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Median time gain

8.0x

Median time gain across 8 formats

Total time for 8 formats

Previous version1 day 10 hr 9 min

SysTools MBOX Converter6 hr 36 min 21 sec

1 day 3 hr 32 min 39 sec saved

Same 23 GB MBOX file, same 8 formats

Quick numbers

13.4xBiggest gain, MBOX to EML

19 min 35 secQuickest export, MBOX to EML

123,596MBOX mails (23 GB) in every test

Watch MBOX Converter Finish Before Previous Version

Select an export format and press Replay. Both bars use real test times, sped up so you can watch them finish.

Previous version

Finished 4 hr 23 min

SysTools MBOX Converter

Finished 19 min 35 sec

13.4x

faster, saves 4 hr 3 min 25 sec

Test Setup for the MBOX Converter Comparison

Results cover time, output size and mails written for 10 export formats from one MBOX source of 23 GB.

123,596

Mails in the MBOX source

123,419

Mails processed in every new test

23 GB

Source size

Export formats

Previous version has results for 9 of the 10 formats, and 8 of them finished. JSON is not part of previous version.

MBOX Converter Speed Comparison by Export Format

SysTools MBOX Converter beat previous version in all 8 formats that both versions finished. EML shows the biggest gain at 13.4 times, and CSV shows the smallest at 1.8 times, which still saves 1 hour 46 minutes.

Previous versionSysTools MBOX ConverterGreen bar length shows the share of previous time.

EML

MBOX to EML93% less time

13.4x

Previous4 hr 23 min

New19 min 35 sec

Saves 4 hr 3 min 25 sec

HTML

MBOX to HTML91% less time

11.1x

Previous4 hr 45 min

New25 min 44 sec

Saves 4 hr 19 min 16 sec

TXT

MBOX to TXT89% less time

9.1x

Previous4 hr 30 min

New29 min 34 sec

Saves 4 hr 26 sec

EMLX

MBOX to EMLX89% less time

9.0x

Previous3 hr 36 min

New24 min 5 sec

Saves 3 hr 11 min 55 sec

MHT

MBOX to MHT86% less time

6.9x

Previous4 hr 3 min

New35 min 1 sec

Saves 3 hr 27 min 59 sec

MSG

MBOX to MSG81% less time

5.3x

Previous3 hr 43 min

New42 min 22 sec

Saves 3 hr 38 sec

PST

MBOX to PST74% less time

3.8x

Previous5 hr 2 min

New1 hr 19 min

Saves 3 hr 43 min

CSV

MBOX to CSV43% less time

1.8x

Previous4 hr 7 min

New2 hr 21 min

Saves 1 hr 46 min

PDF

MBOX to PDFNo previous result

No result

New53 min 18 sec

Previous version stopped at 60,269 mails after 6 hr 27 min

JSON

MBOX to JSONNew export format

New

New21 min 40 sec

Previous version does not support this format

Speed Gain by Export Format

Time Taken by Export Format

Previous versionSysTools MBOX Converter

Export Format	New Version	Previous Version	Speed Gain
MBOX to PDF	53 min 18 sec	Stopped at 60,269 mails after 6 hr 27 min	No result
MBOX to PST	1 hr 19 min	5 hr 2 min	3.8x
MBOX to MSG	42 min 22 sec	3 hr 43 min	5.3x
MBOX to MHT	35 min 1 sec	4 hr 3 min	6.9x
MBOX to CSV	2 hr 21 min	4 hr 7 min	1.8x
MBOX to TXT	29 min 34 sec	4 hr 30 min	9.1x
MBOX to EML	19 min 35 sec	4 hr 23 min	13.4x
MBOX to HTML	25 min 44 sec	4 hr 45 min	11.1x
MBOX to EMLX	24 min 5 sec	3 hr 36 min	9.0x
MBOX to JSON	21 min 40 sec	Not supported	New

Together, the 8 formats took previous version 1 day 10 hours 9 minutes. SysTools MBOX Converter finished the same exports in 6 hours 36 minutes 21 seconds.

Previous version stopped on PDF at 60,269 mails after 6 hours 27 minutes, when the test machine restarted. SysTools MBOX Converter finished PDF in 53 minutes 18 seconds.

MBOX to JSON is new. SysTools MBOX Converter finished it in 21 minutes 40 seconds, and previous version has no JSON export.

Output Size and Files Converted by Format

MHT output is the largest at 39.5 GB from a 23 GB source. PST, MSG, PDF, EML and EMLX outputs land between 21.8 GB and 22.7 GB, and CSV, TXT and JSON outputs land near 15.8 GB.

Output Size by Export Format

Previous versionSysTools MBOX ConverterSource 23 GB

Export Format	Files Out, New	Files Out, Previous	Output Size, New	Output Size, Previous
MBOX to PDF	123,288	60,269 (then stopped)	22.2 GB	Not recorded
MBOX to PST	123,288	123,596	21.8 GB	Not recorded
MBOX to MSG	123,404	123,596	21.8 GB	Not recorded
MBOX to MHT	123,419	123,596	39.5 GB	Not recorded
MBOX to CSV	123,379	123,596	15.9 GB	Not recorded
MBOX to TXT	123,130	123,596	15.7 GB	Not recorded
MBOX to EML	123,419	123,560	22.7 GB	Not recorded
MBOX to HTML	123,418	123,557	17.1 GB	32.4 GB
MBOX to EMLX	123,419	123,489	22.7 GB	44.8 GB
MBOX to JSON	123,419	Not recorded	15.7 GB	Not recorded

SysTools MBOX Converter processed 123,419 mails in every test and exported between 123,130 and 123,419 of them. Previous version shows between 123,489 and 123,596 mails on its screen in 8 formats.

Previous version output sizes appear only for HTML at 32.4 GB and EMLX at 44.8 GB, and the test log has no size for the other formats.

Source is 123,596 mails and 23 GB in every test. Previous version counts come from its screen, and Not recorded means the test log has no value for that cell.

Want the export steps? Open the SysTools MBOX Converter Guide or visit the SysTools MBOX Converter page.

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