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Home»Crypto»The bottleneck problem: Why ‘fast’ blockchains fail when it counts most
Crypto

The bottleneck problem: Why ‘fast’ blockchains fail when it counts most

June 27, 2025No Comments3 Mins Read
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Disclosure: The views and opinions expressed here belong solely to the author and do not represent the views and opinions of crypto.news’ editorial.

Blockchain developers have long prioritized speed as a key performance metric, with transactions per second (TPS) serving as a benchmark for technological advancement. However, high-TPS blockchains have faced challenges during periods of real-world demand, highlighting a structural weakness known as the bottleneck problem.

You might also like: Warning to builders: L2s are leaking value, L1 appchains are the smarter bet | Opinion

While fast blockchains are expected to excel under pressure, many struggle in practice due to technical constraints that emerge when throughput is prioritized over systemic friction. These limits are most evident during spikes in user activity, when the network is under the most strain.

The first bottleneck occurs at the validator and node level, where nodes must quickly process and validate a large number of transactions to support high TPS. However, not all nodes operate optimally, leading to delays in block propagation and consensus fragmentation.

User behavior also contributes to the bottleneck problem, as high-traffic periods cause mempools to fill up with pending transactions. This results in a competitive environment where sophisticated users and bots engage in front-running strategies, impacting legitimate transactions.

Propagation delays further exacerbate the issue, as uneven communication between nodes can lead to temporary forks and chain reorganizations. Additionally, consensus algorithms face increased stress from high-frequency block creation, increasing the risk of validator misalignment and slashing errors.

Storage efficiency is another concern for high-speed blockchains, as the growing ledger size can increase the cost of running a node and centralize control in the hands of those with high-performance infrastructure.

Fortunately, the industry has responded with engineering solutions to address these challenges, including local fee markets, anti-front-running tools, new propagation techniques, modular consensus layers, and storage optimization strategies.

These advancements not only improve technical performance but also deter market manipulation, making it harder for malicious actors to exploit network inefficiencies for their gain.

Looking ahead, blockchain platforms must prioritize efficiency to ensure resilience under future pressure and define the standard for performance in the era of web3.

Read more: Solana network extensions will redefine blockchain scaling | Opinion

Christopher Louis Tsu

Christopher Louis Tsu is the CEO of Venom Foundation, a layer-0 blockchain protocol focused on scalable, secure, and compliant solutions for global web3 infrastructure. With over two decades of experience at the intersection of finance and technology, including leadership roles at Amazon and Microsoft, he now leads the development of interoperable ecosystems that bridge traditional finance with decentralized technologies.

blockchains bottleneck counts fail fast Problem
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