chore(bench): exclude rides under 10 km

3 files changed, 8 insertions, 8 deletions

diff --git a/cli/cli.go b/cli/cli.go
index 4459946..cac29ec 100644
--- a/cli/cli.go
+++ b/cli/cli.go
@@ -32,7 +32,7 @@ var (
 	backtest    = flag.Bool("backtest", false, "run data benchmarks comparing computed values against stored reference values")
 )
 
-const backtestMinimumElapsedTimeS = 15 * 60
+const backtestMinimumDistanceM = 10_000
 
 func Run(db *sql.DB, configPath string, appConfig config.Config) {
 	switch {
@@ -134,12 +134,12 @@ func runBacktest(db *sql.DB) error {
 		fmt.Fprintf(table, "p%g\t%.1f\n", p, distribution[p])
 	}
 	table.Flush()
-	slog.Info("Moving time backtest", "rides", len(samples), "min_elapsed_s", backtestMinimumElapsedTimeS, "mean_err_pct", math.Round(meanAbsErr(absErrors)*10)/10, "stderr_pct", math.Round(stdErrAbsErr(absErrors)*10)/10)
+	slog.Info("Moving time backtest", "rides", len(samples), "min_distance_m", backtestMinimumDistanceM, "mean_err_pct", math.Round(meanAbsErr(absErrors)*10)/10, "stderr_pct", math.Round(stdErrAbsErr(absErrors)*10)/10)
 	return nil
 }
 
 func isBacktestEligible(item rides.Ride) bool {
-	return item.GPXPath != "" && item.ElapsedTimeS >= backtestMinimumElapsedTimeS && item.MovingTimeS > 0
+	return item.GPXPath != "" && item.DistanceM >= backtestMinimumDistanceM && item.MovingTimeS > 0
 }
 
 func meanAbsErr(absErrors []float64) float64 {
diff --git a/cli/cli_test.go b/cli/cli_test.go
index ae59c6c..6a3e148 100644
--- a/cli/cli_test.go
+++ b/cli/cli_test.go
@@ -7,9 +7,9 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestBacktestEligibilityExcludesShortRides(t *testing.T) {
-	short := rides.Ride{GPXPath: "ride.gpx", ElapsedTimeS: 15*60 - 1, MovingTimeS: 1}
-	minimum := rides.Ride{GPXPath: "ride.gpx", ElapsedTimeS: 15 * 60, MovingTimeS: 1}
+func TestBacktestEligibilityExcludesShortDistances(t *testing.T) {
+	short := rides.Ride{GPXPath: "ride.gpx", DistanceM: 10_000 - 1, MovingTimeS: 1}
+	minimum := rides.Ride{GPXPath: "ride.gpx", DistanceM: 10_000, MovingTimeS: 1}
 
 	assert.False(t, isBacktestEligible(short))
 	assert.True(t, isBacktestEligible(minimum))
diff --git a/ride/moving_time.go b/ride/moving_time.go
index 9ac6c05..7d7f5fe 100644
--- a/ride/moving_time.go
+++ b/ride/moving_time.go
@@ -16,8 +16,8 @@ const movingTimeMinPowerW = 20
 // that can count as moving. Longer gaps are pauses (stops, lost signal).
 const movingTimeMaxGap = 120 * time.Second
 
-// Bench (237 rides, `-backtest`, elapsed time >= 15 minutes):
-// absMean 2.4%, stderr 0.3, p50 0.6, p75 2.9, p90 7.1, p95 10.7, p99 19.9.
+// Bench (117 rides, `-backtest`, distance >= 10 km):
+// absMean 0.6%, stderr 0.2, p50 0.2, p75 0.4, p90 1.2, p95 2.2, p99 4.8.
 func MovingTime(r Ride) time.Duration {
 	return movingTime(r, movingTimeMinSpeedMps, movingTimeMaxGap)
 }