Characters are subjected to two ASPD-based delays: Attack Speed (ASPD) and Skill Speed (SSPD). ASPD and SSPD are appied on normal attacks and skill respectively and define the time window the character must wait before performing another normal attack or skill. To facilitate discussions, the following models will be used to denote various presentations of ASPD and SSPD.

• ASPD_ms, SSPD_ms - attack & skill speed delays in milliseconds (ms)
• ASPD_gm, SSPD_gm - attack & skill speed delays using in-game representations

SSPD is a function of ASPD and Attack Motion Time Term (AMTT). AMTT is a zone server parameter and is set to 100 ms in episodes ≤ 13.2. SSPD is equal to half ASPD + AMTT. It follows that SSPD < ASPD while ASPD < 190 and SSPD == ASPD when ASPD == 190.

# amtt = 100 aspd_ms = 20 * (200 - aspd_gm) sspd_ms = aspd_ms / 2 + amtt sspd_gm = 200 - sspd_ms / 20

This often translates to an "ASPD bonus" while using skills. E.g. a 150 ASPD_gm Swordman is able to Bash with a 170 ASPD_gm equivalent delay (600 vs. 1,000 ms). This effect is more pronounced on characters with low ASPD_gm (+60% @ 160) and becomes negligible on characters with high ASPD_gm (+5% @ 189).

While behavior is significant interest for players whose characters access skills with cast times and delays. Despite the animation, the ASPD-delay is applied when the skill cast channel starts, not when it completes. Consequently, the requisite SSPD to not be ASPD-limited is the direct sum of cast time and cast delay. If a character is ASPD-limited, their skill rate is throttled to their SSPD. To readily calculate this ASPD for any skill with a cast time or delay, see the Skill Speed Calculator.