hardware: jlink pro.
oocd master:  0.12.0+dev-00365-gb388f4805 (2023-10-27-13:56)
openocd -f interface/jlink.cfg -f target/stellaris.cfg

(gdb) load
Loading section .text, size 0x27e568 lma 0x60000000
Loading section .data, size 0xb68e0 lma 0x6027e570
Loading section .fast_code, size 0x8a608 lma 0x60335000
Start address 0x60000b9c, load size 3929168
Transfer rate: 37 KB/sec, 16037 bytes/write.
(gdb)


oocd with "-c adapter speed 10000"
(gdb) load
Loading section .text, size 0x27e568 lma 0x60000000
Loading section .data, size 0xb68e0 lma 0x6027e570
Loading section .fast_code, size 0x8a608 lma 0x60335000
Start address 0x60000b9c, load size 3929168
Transfer rate: 549 KB/sec, 16037 bytes/write.
(gdb)

oocd with adapter speed 20000
(gdb) load
Loading section .text, size 0x27e568 lma 0x60000000
Loading section .data, size 0xb68e0 lma 0x6027e570
Loading section .fast_code, size 0x8a608 lma 0x60335000
Start address 0x60000b9c, load size 3929168
Transfer rate: 868 KB/sec, 16037 bytes/write.
(gdb)

jlinkgdbserver 7.92 @ 9600 / swd
(gdb) load
Loading section .text, size 0x27e568 lma 0x60000000
Loading section .data, size 0xb68e0 lma 0x6027e570
Loading section .fast_code, size 0x8a608 lma 0x60335000
Start address 0x60000b9c, load size 3929168
Transfer rate: 770 KB/sec, 16037 bytes/write.
(gdb) 

jlinkgdbserver 7.92 @ 20000 / swd
(gdb) load
Loading section .text, size 0x27e568 lma 0x60000000
Loading section .data, size 0xb68e0 lma 0x6027e570
Loading section .fast_code, size 0x8a608 lma 0x60335000
Start address 0x60000b9c, load size 3929168
Transfer rate: 1504 KB/sec, 16037 bytes/write.
(gdb)