oclHashcat v2.10 performance questions?

[halexan]

Version of oclHashcat is "v2.10 beta 192"

When cracking -m=5500 NetNTLMv1. The following results are extremely different! 

Running benchmark, speed is 1218.2 MH/s.

Code:

./oclHashcat64.bin -m 5500 -b --opencl-device-types 1 oclHashcat v2.01 (gaef8dc2) starting in benchmark-mode... Device #1: GeForce GTX 970, skipped Device #2: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz, 8016/32065 MB allocatable, 2400Mhz, 24MCU Hashtype: NetNTLMv1-VANILLA / NetNTLMv1+ESS Speed.Dev.#2.:  1218.2 MH/s (82.75ms) Started: Wed Apr 27 16:17:57 2016 Stopped: Wed Apr 27 16:17:59 2016

Using wordlist, speed is 4558.7 kH/s!!! Its too slow! 

Code:

./oclHashcat64.bin -m 5500 /home/pptp.txt /home/dict_20160122.txt --opencl-device-types 1 oclHashcat v2.01 (gaef8dc2) starting... Device #1: GeForce GTX 970, skipped                         Device #2: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz, 8016/32065 MB allocatable, 2400Mhz, 24MCU Hashes: 1 hashes; 1 unique digests, 1 unique salts Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates Rules: 1 Applicable Optimizers: * Zero-Byte * Precompute-Final-Permutation * Not-Iterated * Single-Hash * Single-Salt Watchdog: Temperature abort trigger set to 90c Watchdog: Temperature retain trigger disabled Device #2: Kernel /home/oclHashcat-2.10b192/kernels/m05500_a0.9b12b1e1.kernel (492680 bytes) Cache-hit dictionary stats /home/dict_20160122.txt: 4473009478 bytes, 397531497 words, 397531497 keyspace [s]tatus [p]ause [r]esume [b]ypass [c]heckpoint [q]uit => s Session.Name...: oclHashcat Status.........: Running Input.Mode.....: File (/home/dict_20160122.txt) Hash.Target....: XXXXXXX::::XXXXXXXXXXXXXXXXXXXXXXXXXX... Hash.Type......: NetNTLMv1-VANILLA / NetNTLMv1+ESS Time.Started...: Wed Apr 27 16:17:41 2016 (2 secs) Time.Estimated.: Wed Apr 27 16:19:09 2016 (1 min, 25 secs) Speed.Dev.#2...:  4558.7 kH/s (0.96ms) Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts Progress.......: 8848352/397531497 (2.23%) Rejected.......: 992/8848352 (0.01%) Restore.Point..: 8836064/397531497 (2.22%) HWMon.GPU.#2...: N/A Util, N/A Temp, N/A Fan

I remember that hashcat v2.00's speeds of Straight and Brute-force mode do not have such difference, for example, benchmark speed is 190Mh/s and Straight mode is 80Mh/s.

Why the speeds are so different on oclHashcat v2.10?