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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
export function calculateErrorRate(metrics) {
if (metrics.api.totalRequests === 0) {
return 0;
}
return (metrics.api.totalErrors / metrics.api.totalRequests) * 100;
}
export function calculateAverageLatency(metrics) {
if (metrics.api.totalRequests === 0) {
return 0;
}
return metrics.api.totalLatencyMs / metrics.api.totalRequests;
}
export function calculateCacheHitRate(metrics) {
if (metrics.tokens.prompt === 0) {
return 0;
}
return (metrics.tokens.cached / metrics.tokens.prompt) * 100;
}
export const computeSessionStats = (metrics) => {
const { models, tools } = metrics;
const totalApiTime = Object.values(models).reduce((acc, model) => acc + model.api.totalLatencyMs, 0);
const totalToolTime = tools.totalDurationMs;
const agentActiveTime = totalApiTime + totalToolTime;
const apiTimePercent = agentActiveTime > 0 ? (totalApiTime / agentActiveTime) * 100 : 0;
const toolTimePercent = agentActiveTime > 0 ? (totalToolTime / agentActiveTime) * 100 : 0;
const totalCachedTokens = Object.values(models).reduce((acc, model) => acc + model.tokens.cached, 0);
const totalPromptTokens = Object.values(models).reduce((acc, model) => acc + model.tokens.prompt, 0);
const cacheEfficiency = totalPromptTokens > 0 ? (totalCachedTokens / totalPromptTokens) * 100 : 0;
const totalDecisions = tools.totalDecisions.accept +
tools.totalDecisions.reject +
tools.totalDecisions.modify;
const successRate = tools.totalCalls > 0 ? (tools.totalSuccess / tools.totalCalls) * 100 : 0;
const agreementRate = totalDecisions > 0
? (tools.totalDecisions.accept / totalDecisions) * 100
: 0;
return {
totalApiTime,
totalToolTime,
agentActiveTime,
apiTimePercent,
toolTimePercent,
cacheEfficiency,
totalDecisions,
successRate,
agreementRate,
totalCachedTokens,
totalPromptTokens,
};
};
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