Deep Dive
1. Gas Limit Increase to 140M (May 2026)
Overview: This upgrade raised the block gas limit on the Polygon PoS mainnet, directly increasing the number of transactions the chain can process per second. For users, this means the network is better equipped to handle high demand without congestion.
The key change was increasing the gas limit to 140 million units per block. This technical adjustment allows each block to contain more transaction data, raising the theoretical maximum throughput to over 3,800 transactions per second (TPS). The upgrade is designed to keep transaction costs low even during periods of peak activity, supporting Polygon's focus on high-frequency payments and settlements.
What this means: This is bullish for POL because it makes the network faster and more scalable for real-world use cases like global payments. Users benefit from more reliable transactions and lower fees during busy times, strengthening Polygon's value as a utility layer.
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2. Madhugiri Hard Fork (December 2025)
Overview: This mainnet hard fork was a performance-focused upgrade that made blocks faster and increased overall network capacity. It allows the chain to process more transactions simultaneously.
The hard fork, activated at block height 80,084,800, implemented Polygon Improvement Proposal (PIP) 75. It raised the block gas limit from 30 million to 45 million—a 33% capacity increase. It also reduced the block consensus time to one second, enabling faster transaction finality. The upgrade integrated several Ethereum Improvement Proposals (EIPs) for enhanced security and efficiency.
What this means: This is bullish for POL because it directly improves network speed and efficiency. Faster block times mean quicker transaction confirmations, while higher capacity reduces the risk of network slowdowns, making Polygon more attractive for developers and businesses.
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3. Rio Upgrade Testnet Launch (September 2025)
Overview: Deployed to the Amoy testnet, the Rio upgrade introduced architectural changes to significantly scale the network's transaction processing capabilities, laying groundwork for a mainnet release.
The upgrade centers on two major proposals. PIP-64 establishes a Validator-Elected Block Producer (VEBloP) model, separating block production from validation to increase throughput and eliminate chain reorganizations. PIP-72 introduces "Witness-Based Stateless Verification," allowing validators to confirm blocks without storing the full blockchain history, reducing hardware costs and sync times.
What this means: This is bullish for POL because it represents a major step toward handling thousands of transactions per second. A more efficient and decentralized network foundation can drive long-term adoption by developers building demanding applications.
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4. Heimdall v2 Mainnet Migration (July 2025)
Overview: This migration updated the network's core consensus client, which is responsible for validator management and block production. It was a necessary technical overhaul to support future growth.
Heimdall is the consensus layer for the Polygon PoS network. The v2 migration involved key technical changes, including shifting data encoding formats and modifying how validator keys are managed. The upgrade required a planned three-hour deployment window during which bridging and staking services were temporarily paused.
What this means: This is neutral for POL as it was a necessary infrastructure update rather than a direct user-facing feature. It strengthens the network's long-term security and reliability, which is essential for maintaining trust as the ecosystem expands.
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Conclusion
Polygon's development trajectory is firmly focused on scaling throughput and finality, evidenced by consecutive upgrades that boost capacity, speed, and efficiency. These technical improvements collectively strengthen its foundation for payments and settlements. How will the planned Gigagas roadmap, targeting 100,000 TPS, further transform its competitive position?