The 'flowerbed_#' block models used by the pink petals have several block faces that can never be seen by the player, potentially causing frame drops.
Linked issues
relates to 14
MC-267127
Composter model is unoptimized, causing extra rendering lag
Open
MC-250246
Moving in mangrove swamps FPS/TPS drop below normal forests
Reopened
MC-262427
Flower pots and potted objects have very poorly optimized models and strange texture mapping
Open
MC-262452
Hopper models are unoptimized and cause rendering lag
Open
MC-262461
Stair models are unoptimized and can cause rendering lag
Open
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For me, the performance gain was much less noticeable, bit it was still a difference of around 5-10 FPS (tested it on a grass platform on a Cherry Grove single biome world, but there were less pink petals).