The BIOS boot loader added back support for gzip and bzip2, but removed support for graphics mode (by default) to address size problems. (The EFI boot loader is unchanged with support for all of those. Sponsored by Netflix.) Lots of improvements to the network stack, including performance improvements and bug fixes for the sctp(4) stack. Descriptors returned by sctp_peeloff(2) now inherit capabilities from the parent socket. (Sponsored by The FreeBSD Foundation.) AIM(Adaptive Interrupt Moderation) support has been added to the igc(4) driver. 472a0ccf847a (Sponsored by Rubicon Communications, LLC 'Netgate' and BBOX.io.) This feature has also been added to the lem(4), em(4) and igb(4) drivers. A major regression in UDP performance introduced in FreeBSD 12.0, including NFS over UDP, is believed to be fixed with this change. 49f12d5b38f6 (Sponsored by Rubicon Communications, LLC 'Netgate"' and BBOX.io.) The LinuxKPI, particularly for 802.11, has been enhanced to improve the stability of wireless drivers such as iwlwifi(4). (Sponsored by The FreeBSD Foundation.)
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