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Michael Doswald commented on PDFBOX-3432: ----------------------------------------- The benchmark compares the GS Collections implementation against the simple implementation I added in the first patch. The if-else code is just there for the test and is not meant to be added in the final solution. I am currently pretty busy with other things that's why I didn't follow up on this. I'll perform some more tests as soon as I get some more time to spare. > Optimize CID to GlyphId mapping (TTF) > ------------------------------------- > > Key: PDFBOX-3432 > URL: https://issues.apache.org/jira/browse/PDFBOX-3432 > Project: PDFBox > Issue Type: Improvement > Components: FontBox > Affects Versions: 2.0.1, 2.0.2, 2.0.3 > Environment: Ubuntu 14.04.4 LTS > Reporter: Michael Doswald > Priority: Trivial > Labels: optimization, performance > Fix For: 2.0.3, 2.1.0 > > Attachments: PDFBOX-3432_Optimize_CID_to_GlyphId_mapping_rev1.patch, > fontbox-benchmark-CustomMap-VS-GSCollections.zip, > patch_for_CustomMap_VS_GSCollections_benchmark.patch, > pdfbox-performance-PDFBOX-3432.zip > > > TTF fonts map code-points (Code IDs) to glyphs. These are mappings from int > to int. Because the JDK lacks map classes for primitive types, the code (e.g. > in CmapSubtable) currently uses Map<Integer,Integer> for those mappings. This > is inefficient in different ways: > * Autoboxing/unboxing introduces a performance penalty > * Boxing to Integer objects has a memory overhead > * The JDK Map implementation has a big memory overhead for such simple objects > For efficiency (execution time and memory consumption) I would propose to > introduce a simple IntIntMap implementation which works with primitive > integers. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org