mirrors/pdf.js
1
0
Fork 0
mirror of https://github.com/mozilla/pdf.js.git synced 2025-04-24 09:08:07 +02:00
Code Activity

Improve performance when reading very large TrueType "cmap" tables (issue 19319)

Browse source 
In the affected font the total number of mapping-entries is `1142348`, and no less than `997473` of them are duplicates.
Given that every duplicate causes a lot of Array elements to be moved this becomes extremely inefficient, which we can avoid by keeping track of seen `charCode`s and directly build the final mappings-Array instead.
This commit is contained in:
Jonas Jenwald 2025-01-13 13:03:59 +01:00
parent e1b972aac3
commit 5e569cade5
3 changed files with 21 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

1
test/pdfs/issue19319.pdf.link Normal file
View file

@ -0,0 +1 @@
https://github.com/user-attachments/files/18396493/2023-ESG-report-eng.pdf

10
test/test_manifest.json
View file

@ -11254,5 +11254,15 @@
"rounds": 1,
"link": true,
"type": "other"
},
{
"id": "issue19319",
"file": "pdfs/issue19319.pdf",
"md5": "8612d3f0cf2dd067ea4aec9c8bf98763",
"rounds": 1,
"link": true,
"firstPage": 2,
"lastPage": 2,
"type": "eq"
}
]