From: Taco Hoekwater <taco@elvenkind.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: PDF sizes
Date: Sat, 16 May 2009 09:20:17 +0200 [thread overview]
Message-ID: <4A0E6931.8030804@elvenkind.com> (raw)
In-Reply-To: <mailman.0.1242457787.3981.ntg-context@ntg.nl>
Hi,
ntg-context-bounces@ntg.nl wrote:
>
> From: Mohamed Bana <mbana.lists@googlemail.com>
> Date: Fri, 15 May 2009 19:51:31 +0100
> To: mailing list for ConTeXt users <ntg-context@ntg.nl>
>
>
> Hi all,
>
> why is the PDF generated from luatex so much smaller in size? When I
> compile slightly larger documents the difference is quite noticeable,
> e.g., 300 KB for pdftex and 56 KB for the same document.
>
> -rw-r--r-- 1 mbana mbana 13K 2009-05-15 19:48 luasize.pdf
> -rw-r--r-- 1 mbana mbana 56K 2009-05-15 19:39 pdfsize.pdf
Because mkiv+luatex treats the fonts differently. If you compare
the fonts in the pdf documents, you'll see this difference:
[taco@ntg tmp]$ pdffonts luasize.pdf
name type emb sub uni object ID
------------------------------------ ------------ --- --- --- ---------
CLWCAI+LMMono10-Regular CID Type 0C yes yes yes 4 0
FRSDEY+MinionPro-Regular CID Type 0C yes yes yes 5 0
[taco@ntg tmp]$ pdffonts pdfsize.pdf
name type emb sub uni object ID
------------------------------------ ------------ --- --- --- ---------
TPEDRB+LMMono10-Regular Type 1 yes yes yes 4 0
QCXLWN+WarnockPro-Regular Type 1 yes yes yes 5 0
The 'CID Type 0' vs 'Type 1' is about encoding (2bytes vs 1byte);
the key to the different sizes is the 'C' in the type category.
In the luatex case, the fonts are internally converted to the newer
'Type 1 CFF' font format, which is much more compact than 'oldfashioned'
Type 1. IIRC, dvipdfmx uses 'Type 1C' (1byte CFF), so that should also
be smaller than pdftex.
Best wishes,
Taco
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parent reply other threads:[~2009-05-16 7:20 UTC|newest]
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