har-summary
Utility to summarise component information from a HAR file
Uses yslow and custom processing to output a summary (only) of HAR files generated by e.g Chrome.
Installation
npm install -g har-summary
Usage
har-summary <filename> [<configFilename>]
Config file
JSON file to support input from multiple har files representing different page loads.
- "pages" : an array of page objects
- page object
- Properties
- "id" : Must match the url of the first request object in the HAR file. This is used to reference e.g the cdn details
- "cdn" : object with "internal" and "external" string arrays representing known cdn's
- Properties
Example
{
"pages" : [
{
"id" : "http://www.somesite.com",
"cdn": {
"internal": ["http://static.somesite.com"]
}
}
]
}
Sample output
{
"yslow": {
"stats": {
"totalWeight": 902730,
"totalRequests_excludingRedirects": 123,
"documents": {
"requests": 7,
"weight": 41594
},
"css": {
"requests": 4,
"weight": 37261
},
"javascript": {
"requests": 55,
"weight": 555275
},
"cssImages": {
"requests": 5,
"weight": 70720
},
"json": {
"requests": 2,
"weight": 27586
},
"flash": {
"requests": 2,
"weight": 160282
},
"redirects": {
"requests": 8,
"weight": 933
}
}
},
"summary": {
"requestCount": {
"internal": 20,
"external": 108
},
"relativeToPageLoad": {
"total": {
"before": 68,
"after": 60
},
"internal": {
"before": 20,
"after": 0
},
"external": {
"before": 48,
"after": 60
}
}
}
}
Remarks
There is a discrepancy between the total requests reported by yslow and the sum of custom internal and external requests. I "think" this is because yslow is not counting redirects for resources. That's just a guess though.