Upload and use font asset will cause report generate slow

[章恩齊]

After upload and use custom font will make report generate slow. 
Before use custom font nearly 2 seconds, after use custom font spend nearly 20 seconds.

playground link below:

http://59.124.92.142:5488/studio/templates/BkrFlySoe

[Jan Blaha]

1. You can speed it up by allowing phantomjs to cache the font. 

Try to set this config https://jsreport.net/learn/faq#performance

2. Using link to embed font will speed it up even more because it avoids base64 encoding

https://jsreport.net/learn/assets#embedding-assets-as-links

3. Your font is huge ~10MB, normal fonts are usually ~100KB. This is the main problem. Maybe you find alternative smaller download.