Describe the Bug/Issue
It doesnt matter what your doin as fire mage. You will always get minispikes like small screenfrozes while u are in the fire specc.

build: v8.3.0-04-22.03
level: 118 (118)
class: MAGE
spec: fire

talents: flame_on
frenetic_speed
living_bomb
meteor
rune_of_power
searing_touch
shimmer

azerite: none

essences: none*, none

sets/legendaries/artifacts: sephuzs_secret = 1

gear: alluring_glowfly_lantern = 1
ancient_bloodmoon_cloak = 1
band_of_destiny = 1
exquisite_sunderseer_mantle = 1
heart_of_azeroth = 1
loa_speakers_bands = 1
loa_speakers_grasps = 1
loa_speakers_sandals = 1
sephuzs_secret = 1
strong_juju_bloodletter = 1
tattered_dreadmist_leggings = 1
tattered_dreadmist_mask = 1
tattered_dreadmist_robe = 1
terminus_signaling_beacon = 1
tickers_spare_catalyst = 1
zannesu_journey = 1

corruptions: none

itemIDs: 122250, 122256, 122262, 122378, 122384, 132452, 133970, 151969, 155351, 158075, 158972, 158973, 159014, 159038, 159051, 159077

settings: aoe = 3
buffPadding = 0
custom1Name = Custom 1
custom2Name = Custom 2
cycle = false
cycle_min = 6
damage = true
damageDots = true
damageExpiration = 6
damageRange = 0
debuffPadding = 0
enabled = true
gcdSync = false
maxRefresh = 10
maxTime = 33
nameplateRange = 8
nameplates = false
package = Fire
potion = potion_of_unbridled_fury
potionsReset = 20180919.1
throttleRefresh = false
throttleTime = false
no_scorch_blast = true
prevent_hardcasts = true
pyroblast_pull = true
reserve_runes = 1
save_2_runes = false

toggles: cooldowns = true
custom1 = false
custom2 = false
defensives = false
essences = true
interrupts = false
mode = automatic
potions = false

You can add commentary/feedback to the existing thread. The short summary is that I'm looking for ways to reduce the performance impact from the Fire priority, but it's a complex priority that requires more (re)calculating than other priorities.

There're suggestions in the other thread for reducing performance impact as much as possible. If there's still too much of an impact, don't use it.