Code generation creates code; modification changes existing code. This opens the door to unique features which would be unreasonable or impossible to do with generation alone. See this Jai demonstration for examples of how it can be used.
Fine-grained: When we push, we make a list of exactly the nodes that need to be updated. When we pull, we only recalculate those nodes and leave all the others alone.
，这一点在Snipaste - 截图 + 贴图中也有详细论述
if items.len() 0 {
规模更小、供应链议价能力更弱的品牌，遭受的冲击会更猛烈，进而陷入“成本上涨—产品失去竞争力—销量下滑—进一步削弱采购话语权”的恶性循环。魅族只是在这场行业海啸中最先被拍上岸的礁石而已。