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switch to math/rand/v2 in most places

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this allows removing some ugly instantiations of an rng based on the current
time.

Intn is now IntN for our concurrency-safe prng wrapper to match the randv2 api.

v2 exists since go1.22, which we already require.
This commit is contained in:
Mechiel Lukkien
2024-11-29 13:45:19 +01:00
parent 96a3ecd52c
commit de435fceba
9 changed files with 24 additions and 30 deletions
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7
mtastsdb/refresh.go
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@ -5,7 +5,7 @@ import (
"errors"
"fmt"
"log/slog"
mathrand "math/rand"
mathrand2 "math/rand/v2"
"runtime/debug"
"time"
@ -71,12 +71,11 @@ func refresh1(ctx context.Context, log mlog.Log, resolver dns.Resolver, sleep fu
}
// Randomize list.
rand := mathrand.New(mathrand.NewSource(time.Now().UnixNano()))
for i := range prs {
if i == 0 {
continue
}
j := rand.Intn(i + 1)
j := mathrand2.IntN(i + 1)
prs[i], prs[j] = prs[j], prs[i]
}
@ -87,7 +86,7 @@ func refresh1(ctx context.Context, log mlog.Log, resolver dns.Resolver, sleep fu
go refreshDomain(ctx, log, DB, resolver, pr)
if i < len(prs)-1 {
interval := 3 * int64(time.Hour) / int64(len(prs)-1)
extra := time.Duration(rand.Int63n(interval) - interval/2)
extra := time.Duration(mathrand2.Int64N(interval) - interval/2)
next := start.Add(time.Duration(int64(i+1)*interval) + extra)
d := next.Sub(timeNow())
if d > 0 {