core(server-response-time): fix for lightrider #15156
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connorjclark
commented
Jun 12, 2023
adamraine
reviewed
Jun 12, 2023
core/audits/server-response-time.js
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| const timing = record.timing; | ||
| return timing ? timing.receiveHeadersStart - timing.sendEnd : 0; | ||
| // Lightrider does not have timings for sendEnd, but we do have this timing which should be | ||
| // close. |
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| // close. | |
| // close to the response time. |
| @@ -61,6 +68,14 @@ class ServerResponseTime extends Audit { | |||
| const mainResource = await MainResource.request({devtoolsLog, URL: artifacts.URL}, context); | |||
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| const responseTime = ServerResponseTime.calculateResponseTime(mainResource); | |||
| if (responseTime === null) { | |||
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I'm not aware of a way to force a undefined timing with our unit testing, give we must construct a devtools log as the input.
| // close. | ||
| if (global.isLightrider && record.lrStatistics) return record.lrStatistics.requestMs; | ||
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| if (!record.timing) return null; |
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If we are in LR will record.timing always be falsy?
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Not yet, that is to come.
adamraine
approved these changes
Jun 13, 2023
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This uses the appropriate header in LR to estimate the server response time.