# Klever Blockchain v1.7.15 – Performance Update Now Live!

**URL:** <https://forum.klever.org/t/klever-blockchain-v1-7-15-performance-update-now-live/4096>\
**Category:** News and Announcements\
**Tags:** kleverchain, validator, kvm\
**Created:** [November 4, 2025, 4:48pm UTC](https://forum.klever.org/t/klever-blockchain-v1-7-15-performance-update-now-live/4096 "2025-11-04T16:48:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Duka](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.klever.org/duka/32/415_2.png) [@Duka](https://forum.klever.org/u/Duka)\
**Post date:** [November 4, 2025, 4:48pm UTC](https://forum.klever.org/t/klever-blockchain-v1-7-15-performance-update-now-live/4096/1 "2025-11-04T16:48:54Z")

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![image](https://europe1.discourse-cdn.com/flex013/uploads/klever/original/2X/6/61d8462b48697d1cddcde61689ef20e0e0123bc9.jpeg)

Dear [@Validators](https://forum.klever.org/groups/validators) ,

We’re excited to announce the release of **Klever Blockchain v1.7.15** , now live on **Mainnet**!  
This version delivers **major performance enhancements** , particularly in **smart contract execution** , as well as key **security and infrastructure updates** that make your node operations faster, safer, and more reliable.

Unlike previous releases, this is **not a mandatory upgrade** , but it is **highly recommended** to benefit from the latest optimizations and stability improvements.

* * *

### ⚡ **Performance Improvements**

The Klever Virtual Machine (KVM) just got faster and smarter:

- [KLC-1895] Category-based strategy for VM hook timeout protection → improves smart contract execution efficiency.

- [KLC-1894] Tolerance band validation for smart contract execution timeouts → reduces false-positive timeout errors in consensus.

- [KLC-1904] Fixed VM timeout race condition → ensures more reliable smart contract execution under load.

* * *

### 🔒 **Security Enhancements**

- [KLC-1903] Updated **libp2p dependencies** to address critical security alerts and strengthen peer-to-peer communication security.

* * *

### ✨ **Other Improvements**

**API & Indexing**

- Fixed inconsistencies in `broadcastTx` responses for more predictable API behavior.

- Added `caller` field to smart contract logs for enhanced traceability.

- Improved type handling and data encoding flexibility.

**Infrastructure & DevOps**

- Migrated GitHub workflows to **self-hosted KleverPipe runners** → faster, more reliable CI/CD.

- Upgraded Docker images with multi-flavor and multi-architecture build automation for broader deployment options.

**Documentation & Testing**

- Added **comprehensive community and project documentation** , improving developer onboarding.

- Enhanced **test coverage** for core and indexer components, boosting reliability.

* * *

### 🔄 **Upgrade Notes**

This release contains **no breaking changes**.  
✅ **Migration Path:** Simply update to `v1.7.15-0-gc1de9106` – no configuration or data migrations required.

We recommend upgrading your node to gain:

- Significant smart contract performance gains

- Critical security patches

- Improved network stability and developer tooling

* * *

Let’s continue to build a **faster, safer, and smarter Klever Blockchain** together. 💜

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**Author:** ![fbsobreira](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.klever.org/fbsobreira/32/490_2.png) [@fbsobreira](https://forum.klever.org/u/fbsobreira)\
**Post date:** [November 5, 2025, 9:26am UTC](https://forum.klever.org/t/klever-blockchain-v1-7-15-performance-update-now-live/4096/2 "2025-11-05T09:26:34Z")

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**Validators: please upgrade to v1.7.15 ASAP**

We’re seeing consensus churn from a mixed-version set (1.7.14 vs 1.7.15). With \>25% still on 1.7.14, slower nodes time out on specific tx paths and reject them while 1.7.15 accepts—causing prevote/precommit noise and short-lived instability. Primary/fallback pairs must run the **same** version.

**Action now**

- Upgrade **both** your primary and fallback to **`v1.7.15-0-gc1de9106`**. Don’t mix versions.

- This release has **no breaking changes** and brings major KVM performance gains plus critical security fixes. [Klever](https://forum.klever.org/t/klever-blockchain-v1-7-15-performance-update-now-live/4096)

Network liveness has been recovering on its own, but we need everyone on **1.7.15** to stop the version split and stabilize consensus.