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Decrease in CHM size after upgrading to robohelp 2020

Explorer ,
Sep 02, 2021 Sep 02, 2021

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I recently started using Robohelp 2020 Version 4. I mostly work with CHM. After upgrading the robohelp project to 2020, I noticed a sharp decrease in the chm size from 13678 KB to 8400 KB. Has anyone else has noticed this decrease in chm size? Is there a reason for this, maybe something to do with mprovements in robohelp? Also is there a way to compare two chm files with robohelp?

 

I did test the help file thoroughly, the content seems to be all there, and context sensistive help is working. 

 

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New UI , Output presets , Version control

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Community Expert ,
Sep 02, 2021 Sep 02, 2021

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Never heard that one - CHMs are such ancient tech that I don't think RH could/would make any changes to the way they are created that would save space.

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Community Expert ,
Sep 02, 2021 Sep 02, 2021

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Classic used HTML4 in topics, the New UI uses HTML5. Microsoft's help compiler does not understand 5 so Adobe have to go back to HTML4 when generating the CHM. I guess it's possible the HTML is not quite the same as before accounting for the difference.

 

No way I know of to compare them so I would be comparing topic by topic if that is practical given the number of files. Is that an option?

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Explorer ,
Sep 03, 2021 Sep 03, 2021

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@Peter Grainge It is an option 🙂 I am not very excited about it but it will have to do.for the time being.

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Explorer ,
Sep 03, 2021 Sep 03, 2021

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@Peter Grainge this is a good lead. I will explore it further.

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Community Expert ,
Sep 02, 2021 Sep 02, 2021

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Also, New UI only includes topics and files if they are in the TOC, whereas Classic would include everything. 

 

So you might find there are files no longer included in the output causing the decrease in size.

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Explorer ,
Sep 03, 2021 Sep 03, 2021

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@Amebr Another good lead, does it apply to unused images as well? It is a very old help project, may be over 15 years old. It does have a lot of unused content.

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Community Expert ,
Sep 03, 2021 Sep 03, 2021

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I think Amber's suggestion is more likely.

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Community Expert ,
Sep 05, 2021 Sep 05, 2021

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I believe it's everything. Images, word docs, pdf, topics, etc.

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Explorer ,
Sep 07, 2021 Sep 07, 2021

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Thanks @Amebr 

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