Bicycle access is slow #6781
Description
Expected behavior
A short trip search should return within resonable time.
Observed behavior
Some searches take a very long time (>10s), while most searches take an acceptable time (<2s). This could be related to bicycle access. I run the same query, only changing the access mode and this is the response times:
| Mode | response times |
|---|---|
| bicycle | 14.22s, 13.26s, 17.77s |
| foot | 0.615s, 0.588s |
| car_park | 0.706s |
| car | 2.4s |
All searches return at least one result, except the using car as access mode.
This performance problem goes away if we exclude BIKE transfers in the build-config.json. The test is repeatable, I can change the origin and destination coordinates - I still get the same behaviour.
Note! I am not sure the the bike access is the direct cause of the problem. If I repeat the exact same search, I sometimes get fast response. This might be a cache or Java GC problem triggered by the bicycle access.
Version of OTP used (exact commit hash or JAR name)
v2.8.0-SNAPSHOT (May-2025) 0962f46
Data sets in use (links to GTFS and OSM PBF files)
Entur Norway
Command line used to start OTP
Router config and graph build config JSON
build-config.json
{
"configVersion": "v2.8.0-entur-105",
"dataImportReport": true,
"subwayAccessTime": 0,
"embedRouterConfig": true,
"areaVisibility": true,
"platformEntriesLinking": true,
"staticParkAndRide": true,
"staticBikeParkAndRide": true,
"maxDataImportIssuesPerFile": 1000,
"maxTransferDuration": "30m",
"distanceBetweenElevationSamples": 25,
"multiThreadElevationCalculations": true,
"boardingLocationTags": [],
"transferParametersForMode": {
"CAR": {
"disableDefaultTransfers": true,
"carsAllowedStopMaxTransferDuration": "3h"
}
},
"transferRequests": [
{
"modes": "WALK"
},
{
"modes": "WALK",
"wheelchairAccessibility": {
"enabled": true
}
},
{
"modes": "BICYCLE"
},
{
"modes": "CAR"
}
],
"osmDefaults": {
"osmTagMapping": "norway",
"timeZone": "Europe/Oslo"
},
"osmCacheDataInMem": "true",
"transitServiceStart": "-P2D",
"transitServiceEnd": "P5D",
"netexDefaults": {
"feedId": "RB",
"sharedFilePattern": "stops.*\.xml",
"sharedGroupFilePattern": "(\w{3})(_flexible)?shared_data.xml",
"groupFilePattern": "(\w{3}).*\.xml",
"ignoreFareFrame": false
},
"streetGraph": "streetGraph-${otp.serialization.version.id}.obj",
"graph": "graph-bicycle-${otp.serialization.version.id}.obj",
"buildReportDir": "report"
}