nx9-chronoseal-rs/docs/PERFORMANCE-TUNING.md

ChronoSeal Performance Tuning Guide

ChronoSeal uses a deterministic Synthetic Gene Mutation Engine to strengthen browser session continuity validation. This guide explains how to tune the mutation engine for an appropriate balance between security strength, resource consumption, and user experience.

The primary tuning parameters are:

• gene_size — size of the synthetic gene buffer
• mutation_rounds — number of mutation iterations executed per heartbeat

---

Understanding the Mutation Engine

For every accepted heartbeat, ChronoSeal executes a server-generated mutation program against a synthetic gene buffer.

Increasing mutation complexity raises the computational cost of reproducing valid session state while also increasing CPU utilization on both the server and browser runtime.

General effects:

• Larger gene_size increases mutation state complexity.
• Higher mutation_rounds increase computational work per heartbeat.
• Both increase memory access and CPU consumption.
• Excessive values may negatively impact lower-end mobile devices.

The optimal values depend on your threat model and expected client hardware.

---

Recommended Configurations

Profile	gene_size	mutation_rounds	Security Level	Recommended Usage
Default	512	4	Moderate	Development and testing
Recommended	2048	16	Strong	Most production deployments
High Security	4096	32	Very Strong	Sensitive applications
Maximum Practical	8192	64	Extremely Strong	High-value targets
Experimental	65536	65536	Research Only	Benchmarking and experimentation

Recommended Production Configuration

gene_size = 2048
mutation_rounds = 16

This configuration provides a strong balance between security and runtime overhead for most deployments.

---

Configuration

Edit your configuration file:

# Mutation Engine Settings

gene_size = 2048
mutation_rounds = 16

Common configuration locations:

/etc/chronoseal/config.toml
~/.config/chronoseal/config.toml

Restart ChronoSeal:

sudo systemctl restart chronoseal

Validate the effective configuration:

chronoseal config check --format yaml

---

Performance Monitoring

Server-Side Monitoring

View service logs:

sudo journalctl -u chronoseal -f

Inspect runtime statistics:

chronoseal stats --format json

Enable additional diagnostics when required:

CHRONOSEAL_LOG=debug chronoseal run

Avoid debug logging in production environments.

---

Browser-Side Monitoring

Measure mutation execution time:

console.time("gene-mutation");

const commitment = preview_gene_commitment(
    order_b64,
    session_id,
    mutation_step,
    mutation_rounds
);

console.timeEnd("gene-mutation");

Browser developer tools can also be used to monitor:

• JavaScript execution time
• WASM execution time
• CPU utilization
• Memory consumption

---

Tuning Strategy

Step 1: Start with Recommended Values

gene_size = 2048
mutation_rounds = 16

Deploy and observe normal usage patterns.

Step 2: Monitor Heartbeat Success Rates

Watch for:

• heartbeat failures
• increased browser CPU usage
• elevated mobile device latency
• increased battery consumption

Step 3: Increase Gradually

Increase one parameter at a time.

Recommended progression:

2048 / 16
4096 / 16
4096 / 32
8192 / 32
8192 / 64

This makes it easier to identify performance bottlenecks.

Step 4: Test Mobile Devices

Always test on:

• Android devices
• iPhones
• older laptops
• low-power CPUs

Desktop-only validation can be misleading.

---

Advanced Deployment Strategies

Risk-Based Mutation Strength

Future deployments may choose to dynamically increase mutation strength based on:

• session age
• failed heartbeat history
• suspicious behavior signals
• protected resource sensitivity

Example policy:

New session          → 2048 / 16
Suspicious session   → 4096 / 32
Elevated-risk action → 8192 / 64

---

Performance Recommendations

WASM Builds

Always use optimized builds:

wasm-pack build wasm --target web --release

General Guidance

• Keep mutation_rounds below 64 for most deployments.
• Prefer increasing gene_size before dramatically increasing rounds.
• Benchmark on representative client hardware.
• Monitor browser CPU utilization during load testing.
• Re-evaluate settings after major algorithm changes.

Storage Performance

For maximum throughput:

db_type = "sqlite-in-memory"

For persistence:

db_type = "sqlite-in-disk"

Choose based on operational requirements rather than mutation settings.

---

Security Considerations

Higher values increase the cost of reproducing valid session state but do not provide absolute protection against determined attackers.

ChronoSeal remains a cost-raising attestation layer rather than a complete anti-abuse solution.

Mutation tuning should be considered alongside:

• heartbeat timing controls
• signature validation
• hash-chain continuity
• behavioral trust checks
• rate limiting
• session expiration

---

Recommended Starting Point

For most production deployments:

gene_size = 2048
mutation_rounds = 16

This configuration provides a strong balance between security, performance, and compatibility across desktop and mobile devices.

---

Related Documentation

• docs/ARCHITECTURE.md
• docs/API.md
• docs/THREAT_MODEL.md
• docs/REFRACTORING-v0.6.0.md

For diagnostics:

chronoseal config check
chronoseal stats
chronoseal health