[MIME4J-306] MimeUtil::unfold should group char appends

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.5
• Fix Version/s: 0.8.6
• Component/s: core
• Assignee: Unassigned
• Reporter: Benoit Tellier
• Created: 29/Jul/21 15:06
• Updated: 18/Sep/21 07:38
• Resolved: 18/Sep/21 07:38

Description

Calling repeatedly append requires ensuring the capacity amongst other.

Appends to the string builder can be done for all previous chars when a line delimiter is encountered, thus reducing the cost of the operation.

Gain: 66%

Attached are the flame graphs:

• Before
• After (Combined with MIME4J-304 and MIME4J-305)