Ethereum's sharding deployment aims to enhance scalability by dividing the blockchain into smaller shards, each processing transactions independently. This could improve DApp performance by increasing throughput and reducing congestion. However, it may introduce challenges like cross-shard communication delays, which could impact DApp call efficiency if not optimized. Developers must adapt DApps to handle shard-specific data and ensure seamless interaction across shards. While sharding promises faster transaction processing, the overall effect on DApp efficiency depends on implementation, network synchronization, and DApp design. Early testing suggests potential gains, but complex DApps may face temporary inefficiencies during the transition.