percentile-analyzer

Percentile Analyzer - Auto-activating skill for Performance Testing. Triggers on: percentile analyzer, percentile analyzer Part of the Performance Testing skill category.

1.00x

Quality

Does it follow best practices?

Impact

100%

1.00x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./planned-skills/generated/10-performance-testing/percentile-analyzer/SKILL.md

Evaluation results

100%

Load Testing for E-Commerce Checkout API

k6 load test with percentile thresholds

Criteria

Without context

With context

Uses k6

100%

p95 threshold configured

100%

p99 threshold configured

100%

Staged ramp-up

100%

Normal and peak load phases

100%

Threshold failure behavior

100%

POST request to endpoint

100%

Report file produced

100%

Script filename correct

100%

Production-ready structure

100%

Without context: $0.3605 · 1m 41s · 19 turns · 19 in / 6,167 out tokens

With context: $0.4524 · 1m 49s · 23 turns · 180 in / 7,129 out tokens

100%

API Response Time Analysis Tool

Percentile analysis of response time data

Criteria

Without context

With context

Script created

100%

Reads from file

100%

p50 computed

100%

p90 computed

100%

p95 computed

100%

p99 computed

100%

SLA threshold check p95

100%

SLA threshold check p99

100%

Overall verdict

100%

Report output file

100%

Numeric values in report

100%

Without context: $0.2411 · 52s · 16 turns · 17 in / 3,237 out tokens

With context: $0.4263 · 1m 24s · 26 turns · 315 in / 5,045 out tokens

100%

Performance Regression Detection Between Releases

Benchmarking with percentile comparison across runs

Criteria

Without context

With context

Script created

100%

Reads both input files

100%

p50 compared

100%

p90 compared

100%

p95 compared

100%

p99 compared

100%

Percentage change computed

100%

5% regression threshold

100%

REGRESSION label

100%

Overall verdict

100%

Tabular format

100%

Report output file

100%

Without context: $0.2787 · 1m 2s · 19 turns · 19 in / 3,719 out tokens

With context: $0.3594 · 1m 18s · 26 turns · 57 in / 4,428 out tokens

Repository: jeremylongshore/claude-code-plugins-plus-skills
Commit: 0c08951

Evaluated: 18 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Load Testing for E-Commerce Checkout API API Response Time Analysis Tool Performance Regression Detection Between Releases

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