[chore]: Bump github.com/prometheus/client_golang from 1.20.2 to 1.20.3 (#3282)
Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.20.2 to 1.20.3. - [Release notes](https://github.com/prometheus/client_golang/releases) - [Changelog](https://github.com/prometheus/client_golang/blob/v1.20.3/CHANGELOG.md) - [Commits](https://github.com/prometheus/client_golang/compare/v1.20.2...v1.20.3) --- updated-dependencies: - dependency-name: github.com/prometheus/client_golang dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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dependabot[bot]
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commit
1649bfbee2
2
go.mod
2
go.mod
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@ -46,7 +46,7 @@ require (
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github.com/mitchellh/mapstructure v1.5.0
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github.com/ncruces/go-sqlite3 v0.18.1
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github.com/oklog/ulid v1.3.1
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github.com/prometheus/client_golang v1.20.2
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github.com/prometheus/client_golang v1.20.3
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github.com/spf13/cobra v1.8.1
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github.com/spf13/viper v1.19.0
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github.com/stretchr/testify v1.9.0
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4
go.sum
4
go.sum
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@ -468,8 +468,8 @@ github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRI
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github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
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github.com/prashantv/gostub v1.1.0/go.mod h1:A5zLQHz7ieHGG7is6LLXLz7I8+3LZzsrV0P1IAHhP5U=
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github.com/prometheus/client_golang v1.20.2 h1:5ctymQzZlyOON1666svgwn3s6IKWgfbjsejTMiXIyjg=
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github.com/prometheus/client_golang v1.20.2/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
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github.com/prometheus/client_golang v1.20.3 h1:oPksm4K8B+Vt35tUhw6GbSNSgVlVSBH0qELP/7u83l4=
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github.com/prometheus/client_golang v1.20.3/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
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github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
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github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
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github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
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@ -1658,7 +1658,10 @@ func addAndResetCounts(hot, cold *histogramCounts) {
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type nativeExemplars struct {
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sync.Mutex
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// Time-to-live for exemplars, it is set to -1 if exemplars are disabled, that is NativeHistogramMaxExemplars is below 0.
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// The ttl is used on insertion to remove an exemplar that is older than ttl, if present.
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ttl time.Duration
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exemplars []*dto.Exemplar
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}
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@ -1673,6 +1676,7 @@ func makeNativeExemplars(ttl time.Duration, maxCount int) nativeExemplars {
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if maxCount < 0 {
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maxCount = 0
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ttl = -1
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}
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return nativeExemplars{
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@ -1682,20 +1686,18 @@ func makeNativeExemplars(ttl time.Duration, maxCount int) nativeExemplars {
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}
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func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
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if cap(n.exemplars) == 0 {
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if n.ttl == -1 {
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return
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}
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n.Lock()
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defer n.Unlock()
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// The index where to insert the new exemplar.
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var nIdx int = -1
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// When the number of exemplars has not yet exceeded or
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// is equal to cap(n.exemplars), then
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// insert the new exemplar directly.
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if len(n.exemplars) < cap(n.exemplars) {
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var nIdx int
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for nIdx = 0; nIdx < len(n.exemplars); nIdx++ {
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if *e.Value < *n.exemplars[nIdx].Value {
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break
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@ -1705,15 +1707,44 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
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return
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}
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if len(n.exemplars) == 1 {
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// When the number of exemplars is 1, then
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// replace the existing exemplar with the new exemplar.
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n.exemplars[0] = e
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return
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}
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// From this point on, the number of exemplars is greater than 1.
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// When the number of exemplars exceeds the limit, remove one exemplar.
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var (
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rIdx int // The index where to remove the old exemplar.
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ot = time.Now() // Oldest timestamp seen.
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ot = time.Time{} // Oldest timestamp seen. Initial value doesn't matter as we replace it due to otIdx == -1 in the loop.
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otIdx = -1 // Index of the exemplar with the oldest timestamp.
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md = -1.0 // Logarithm of the delta of the closest pair of exemplars.
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mdIdx = -1 // Index of the older exemplar within the closest pair.
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// The insertion point of the new exemplar in the exemplars slice after insertion.
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// This is calculated purely based on the order of the exemplars by value.
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// nIdx == len(n.exemplars) means the new exemplar is to be inserted after the end.
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nIdx = -1
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// rIdx is ultimately the index for the exemplar that we are replacing with the new exemplar.
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// The aim is to keep a good spread of exemplars by value and not let them bunch up too much.
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// It is calculated in 3 steps:
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// 1. First we set rIdx to the index of the older exemplar within the closest pair by value.
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// That is the following will be true (on log scale):
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// either the exemplar pair on index (rIdx-1, rIdx) or (rIdx, rIdx+1) will have
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// the closest values to each other from all pairs.
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// For example, suppose the values are distributed like this:
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// |-----------x-------------x----------------x----x-----|
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// ^--rIdx as this is older.
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// Or like this:
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// |-----------x-------------x----------------x----x-----|
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// ^--rIdx as this is older.
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// 2. If there is an exemplar that expired, then we simple reset rIdx to that index.
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// 3. We check if by inserting the new exemplar we would create a closer pair at
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// (nIdx-1, nIdx) or (nIdx, nIdx+1) and set rIdx to nIdx-1 or nIdx accordingly to
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// keep the spread of exemplars by value; otherwise we keep rIdx as it is.
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rIdx = -1
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cLog float64 // Logarithm of the current exemplar.
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pLog float64 // Logarithm of the previous exemplar.
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)
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@ -1726,7 +1757,7 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
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}
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// Find the index at which to insert new the exemplar.
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if *e.Value <= *exemplar.Value && nIdx == -1 {
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if nIdx == -1 && *e.Value <= *exemplar.Value {
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nIdx = i
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}
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@ -1738,11 +1769,13 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
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}
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diff := math.Abs(cLog - pLog)
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if md == -1 || diff < md {
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// The closest exemplar pair is at index: i-1, i.
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// Choose the exemplar with the older timestamp for replacement.
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md = diff
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if n.exemplars[i].Timestamp.AsTime().Before(n.exemplars[i-1].Timestamp.AsTime()) {
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mdIdx = i
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rIdx = i
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} else {
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mdIdx = i - 1
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rIdx = i - 1
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}
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}
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@ -1753,8 +1786,12 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
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if nIdx == -1 {
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nIdx = len(n.exemplars)
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}
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// Here, we have the following relationships:
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// n.exemplars[nIdx-1].Value < e.Value (if nIdx > 0)
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// e.Value <= n.exemplars[nIdx].Value (if nIdx < len(n.exemplars))
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if otIdx != -1 && e.Timestamp.AsTime().Sub(ot) > n.ttl {
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// If the oldest exemplar has expired, then replace it with the new exemplar.
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rIdx = otIdx
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} else {
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// In the previous for loop, when calculating the closest pair of exemplars,
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@ -1764,24 +1801,27 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
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if nIdx > 0 {
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diff := math.Abs(elog - math.Log(n.exemplars[nIdx-1].GetValue()))
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if diff < md {
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// The value we are about to insert is closer to the previous exemplar at the insertion point than what we calculated before in rIdx.
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// v--rIdx
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// |-----------x-n-----------x----------------x----x-----|
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// nIdx-1--^ ^--new exemplar value
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// Do not make the spread worse, replace nIdx-1 and not rIdx.
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md = diff
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mdIdx = nIdx
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if n.exemplars[nIdx-1].Timestamp.AsTime().Before(e.Timestamp.AsTime()) {
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mdIdx = nIdx - 1
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}
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rIdx = nIdx - 1
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}
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}
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if nIdx < len(n.exemplars) {
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diff := math.Abs(math.Log(n.exemplars[nIdx].GetValue()) - elog)
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if diff < md {
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mdIdx = nIdx
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if n.exemplars[nIdx].Timestamp.AsTime().Before(e.Timestamp.AsTime()) {
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mdIdx = nIdx
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// The value we are about to insert is closer to the next exemplar at the insertion point than what we calculated before in rIdx.
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// v--rIdx
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// |-----------x-----------n-x----------------x----x-----|
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// new exemplar value--^ ^--nIdx
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// Do not make the spread worse, replace nIdx-1 and not rIdx.
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rIdx = nIdx
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}
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}
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}
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rIdx = mdIdx
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}
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// Adjust the slice according to rIdx and nIdx.
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switch {
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@ -561,7 +561,7 @@ github.com/pkg/errors
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# github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2
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## explicit
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github.com/pmezard/go-difflib/difflib
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# github.com/prometheus/client_golang v1.20.2
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# github.com/prometheus/client_golang v1.20.3
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## explicit; go 1.20
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github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil
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github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil/header
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