diff --git a/CHANGELOG.md b/CHANGELOG.md
index 524ef1a5..7d14c93e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,11 @@ Dropping a requirement of a major version of a dependency is a new contract.
 ## [Unreleased]
 [Unreleased]: https://github.com/atlassian/jira-actions/compare/release-3.24.0...master
 
+### Fixed
+- Speed up all JSON code, by reusing a `JsonProvider` instance. Fix the same root cause as in [JPERF-1401].
+
+[JPERF-1401]: https://ecosystem.atlassian.net/browse/JPERF-1401
+
 ## [3.24.0] - 2023-10-24
 [3.24.0]: https://github.com/atlassian/jira-actions/compare/release-3.23.1...release-3.24.0
 
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/JsonProviderSingleton.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/JsonProviderSingleton.kt
new file mode 100644
index 00000000..7e97b6f8
--- /dev/null
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/JsonProviderSingleton.kt
@@ -0,0 +1,8 @@
+package com.atlassian.performance.tools.jiraactions
+
+import javax.json.spi.JsonProvider
+
+internal object JsonProviderSingleton {
+
+    val JSON: JsonProvider = JsonProvider.provider()
+}
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/ActionMetric.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/ActionMetric.kt
index 2990e258..39cd2b5b 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/ActionMetric.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/ActionMetric.kt
@@ -1,11 +1,11 @@
 package com.atlassian.performance.tools.jiraactions.api
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.w3c.RecordedPerformanceEntries
 import com.atlassian.performance.tools.jiraactions.w3c.VerboseJsonFormat
 import java.time.Duration
 import java.time.Instant
 import java.util.*
-import javax.json.Json
 import javax.json.JsonObject
 
 /**
@@ -63,7 +63,7 @@ data class ActionMetric @Deprecated("Use ActionMetric.Builder instead.") constru
 
     @Deprecated("Use AppendableActionMetricOutput instead.")
     fun toJson(): JsonObject {
-        val builder = Json.createObjectBuilder()
+        val builder = JSON.createObjectBuilder()
             .add("label", label)
             .add("result", result.name)
             .add("duration", duration.toString())
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/SearchIssues.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/SearchIssues.kt
index 2c97f676..ca47e0e5 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/SearchIssues.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/SearchIssues.kt
@@ -1,5 +1,6 @@
 package com.atlassian.performance.tools.jiraactions.api.action
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.ActionType
 import com.atlassian.performance.tools.jiraactions.api.SEARCH_WITH_JQL
 import com.atlassian.performance.tools.jiraactions.api.SeededRandom
@@ -15,7 +16,6 @@ import com.atlassian.performance.tools.jiraactions.api.page.issuenav.DetailView
 import com.atlassian.performance.tools.jiraactions.api.page.issuenav.IssueNavResultsView
 import org.apache.logging.log4j.LogManager
 import org.apache.logging.log4j.Logger
-import javax.json.Json
 import javax.json.JsonObject
 
 class SearchIssues private constructor(
@@ -109,7 +109,7 @@ class SearchIssues private constructor(
             json.getBoolean("switched")
         )
 
-        fun serialize(): JsonObject = Json.createObjectBuilder()
+        fun serialize(): JsonObject = JSON.createObjectBuilder()
             .add("desiredView", desiredView)
             .add("selectedBefore", selectedBefore)
             .add("selectedAfter", selectedAfter)
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewCommentAction.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewCommentAction.kt
index 87326161..3aed586b 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewCommentAction.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewCommentAction.kt
@@ -1,12 +1,12 @@
 package com.atlassian.performance.tools.jiraactions.api.action
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.VIEW_COMMENT
 import com.atlassian.performance.tools.jiraactions.api.WebJira
 import com.atlassian.performance.tools.jiraactions.api.measure.ActionMeter
 import com.atlassian.performance.tools.jiraactions.api.memories.CommentMemory
 import org.apache.logging.log4j.LogManager
 import org.apache.logging.log4j.Logger
-import javax.json.Json
 
 class ViewCommentAction(
     private val jira: WebJira,
@@ -26,7 +26,7 @@ class ViewCommentAction(
             key = VIEW_COMMENT,
             action = { jira.goToComment(comment.url).validateCommentIsFocused(comment.id) },
             observation = { page ->
-                Json.createObjectBuilder()
+                JSON.createObjectBuilder()
                     .add("issueKey", page.getIssueKey())
                     .add("commentId", comment.id)
                     .build()
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewIssueAction.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewIssueAction.kt
index 4898d412..58c647e9 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewIssueAction.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/action/ViewIssueAction.kt
@@ -1,12 +1,12 @@
 package com.atlassian.performance.tools.jiraactions.api.action
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.VIEW_ISSUE
 import com.atlassian.performance.tools.jiraactions.api.WebJira
 import com.atlassian.performance.tools.jiraactions.api.measure.ActionMeter
 import com.atlassian.performance.tools.jiraactions.api.memories.*
 import org.apache.logging.log4j.LogManager
 import org.apache.logging.log4j.Logger
-import javax.json.Json
 
 class ViewIssueAction private constructor(
     private val jira: WebJira,
@@ -44,7 +44,7 @@ class ViewIssueAction private constructor(
             key = VIEW_ISSUE,
             action = { jira.goToIssue(issueKey).waitForSummary() },
             observation = { page ->
-                Json.createObjectBuilder()
+                JSON.createObjectBuilder()
                     .add("issueKey", issueKey)
                     .add("issueId", page.getIssueId())
                     .build()
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricCompactJsonFormat.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricCompactJsonFormat.kt
index 32cf4c39..0905f55b 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricCompactJsonFormat.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricCompactJsonFormat.kt
@@ -1,11 +1,11 @@
 package com.atlassian.performance.tools.jiraactions.api.format
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.ActionMetric
 import com.atlassian.performance.tools.jiraactions.api.ActionResult
 import java.time.Duration
 import java.time.Instant
 import java.util.*
-import javax.json.Json
 import javax.json.JsonObject
 
 /**
@@ -16,7 +16,7 @@ class MetricCompactJsonFormat: MetricJsonFormat {
     override fun serialize(
         actionMetric: ActionMetric
     ): JsonObject = actionMetric.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("label", label)
             .add("result", result.name)
             .add("duration", duration.toString())
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricVerboseJsonFormat.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricVerboseJsonFormat.kt
index 599ee212..d20ece11 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricVerboseJsonFormat.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/format/MetricVerboseJsonFormat.kt
@@ -1,12 +1,12 @@
 package com.atlassian.performance.tools.jiraactions.api.format
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.ActionMetric
 import com.atlassian.performance.tools.jiraactions.api.ActionResult
 import com.atlassian.performance.tools.jiraactions.w3c.VerboseJsonFormat
 import java.time.Duration
 import java.time.Instant
 import java.util.*
-import javax.json.Json
 import javax.json.JsonObject
 
 class MetricVerboseJsonFormat : MetricJsonFormat {
@@ -16,7 +16,7 @@ class MetricVerboseJsonFormat : MetricJsonFormat {
     override fun serialize(
         actionMetric: ActionMetric
     ): JsonObject = actionMetric.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("label", label)
             .add("result", result.name)
             .add("duration", duration.toString())
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssueObservation.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssueObservation.kt
index d16310a9..d6c283ff 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssueObservation.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssueObservation.kt
@@ -1,6 +1,6 @@
 package com.atlassian.performance.tools.jiraactions.api.observation
 
-import javax.json.Json
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import javax.json.JsonObject
 
 data class IssueObservation(
@@ -8,7 +8,7 @@ data class IssueObservation(
 ) {
     constructor(json: JsonObject) : this(json.getString("issueKey"))
 
-    fun serialize(): JsonObject = Json.createObjectBuilder()
+    fun serialize(): JsonObject = JSON.createObjectBuilder()
         .add("issueKey", issueKey)
         .build()
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssuesOnBoard.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssuesOnBoard.kt
index e6309e2c..8e73daf6 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssuesOnBoard.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/IssuesOnBoard.kt
@@ -1,10 +1,10 @@
 package com.atlassian.performance.tools.jiraactions.api.observation
 
-import javax.json.Json
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import javax.json.JsonObject
 
 data class IssuesOnBoard(val issues: Int) {
     constructor(json: JsonObject) : this(json.getInt("issues"))
 
-    fun serialize(): JsonObject = Json.createObjectBuilder().add("issues", issues).build()
-}
\ No newline at end of file
+    fun serialize(): JsonObject = JSON.createObjectBuilder().add("issues", issues).build()
+}
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/SearchJqlObservation.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/SearchJqlObservation.kt
index 220ca824..51c0c80d 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/SearchJqlObservation.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/observation/SearchJqlObservation.kt
@@ -1,6 +1,6 @@
 package com.atlassian.performance.tools.jiraactions.api.observation
 
-import javax.json.Json
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import javax.json.JsonObject
 
 data class SearchJqlObservation(
@@ -10,9 +10,9 @@ data class SearchJqlObservation(
 ) {
     constructor(json: JsonObject) : this(json.getString("jql"), json.getInt("issues"), json.getInt("totalResults"))
 
-    fun serialize(): JsonObject = Json.createObjectBuilder()
+    fun serialize(): JsonObject = JSON.createObjectBuilder()
         .add("jql", jql)
         .add("issues", issues)
         .add("totalResults", totalResults)
         .build()
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/parser/ActionMetricsParser.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/parser/ActionMetricsParser.kt
index ce8e76aa..47cb8054 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/parser/ActionMetricsParser.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/api/parser/ActionMetricsParser.kt
@@ -1,5 +1,6 @@
 package com.atlassian.performance.tools.jiraactions.api.parser
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.ActionMetric
 import com.atlassian.performance.tools.jiraactions.api.format.MetricJsonFormat
 import com.atlassian.performance.tools.jiraactions.api.format.MetricVerboseJsonFormat
@@ -7,7 +8,6 @@ import org.apache.logging.log4j.LogManager
 import java.io.InputStream
 import java.io.StringReader
 import java.util.stream.Stream
-import javax.json.Json
 import javax.json.JsonStructure
 import kotlin.streams.asStream
 import kotlin.streams.toList
@@ -35,7 +35,7 @@ class ActionMetricsParser(private val format: MetricJsonFormat) {
     private fun parseOrNull(
         line: String
     ): JsonStructure? = try {
-        Json.createReader(StringReader(line)).read()
+        JSON.createReader(StringReader(line)).read()
     } catch (e: Exception) {
         logger.debug("Discarding '$line'", e)
         null
diff --git a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/w3c/VerboseJsonFormat.kt b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/w3c/VerboseJsonFormat.kt
index 047780ca..5dbadc51 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/jiraactions/w3c/VerboseJsonFormat.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/jiraactions/w3c/VerboseJsonFormat.kt
@@ -1,5 +1,6 @@
 package com.atlassian.performance.tools.jiraactions.w3c
 
+import com.atlassian.performance.tools.jiraactions.JsonProviderSingleton.JSON
 import com.atlassian.performance.tools.jiraactions.api.w3c.*
 import java.time.Duration
 import javax.json.Json
@@ -11,7 +12,7 @@ internal class VerboseJsonFormat {
     fun serializeRecordedEntries(
         entries: RecordedPerformanceEntries
     ): JsonObject = entries.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("navigations", navigations.map { serializeNavigationTiming(it) }.toJsonArray())
             .add("resources", resources.map { serializeResourceTiming(it) }.toJsonArray())
             .add("elements", (elements.map { serializeElementTiming(it) }).toJsonArray())
@@ -38,7 +39,7 @@ internal class VerboseJsonFormat {
     private fun serializeEntry(
         entry: PerformanceEntry
     ): JsonObject = entry.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("name", name)
             .add("entryType", entryType)
             .add("startTime", startTime.toString())
@@ -60,7 +61,7 @@ internal class VerboseJsonFormat {
     private fun serializeResourceTiming(
         resourceTiming: PerformanceResourceTiming
     ): JsonObject = resourceTiming.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("entry", serializeEntry(entry))
             .add("initiatorType", initiatorType)
             .add("nextHopProtocol", nextHopProtocol)
@@ -118,7 +119,7 @@ internal class VerboseJsonFormat {
     private fun serializeNavigationTiming(
         navigationTiming: PerformanceNavigationTiming
     ): JsonObject = navigationTiming.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("resource", serializeResourceTiming(resource))
             .add("unloadEventStart", unloadEventStart.toString())
             .add("unloadEventEnd", unloadEventEnd.toString())
@@ -154,7 +155,7 @@ internal class VerboseJsonFormat {
     private fun serializeServerTiming(
         serverTiming: PerformanceServerTiming
     ): JsonObject = serverTiming.run {
-        Json.createObjectBuilder()
+        JSON.createObjectBuilder()
             .add("name", serverTiming.name)
             .add("duration", serverTiming.duration.toString())
             .add("description", serverTiming.description)
@@ -172,7 +173,7 @@ internal class VerboseJsonFormat {
     }
 
     private fun List<JsonObject>.toJsonArray(): JsonArray {
-        val builder = Json.createArrayBuilder()
+        val builder = JSON.createArrayBuilder()
         forEach { builder.add(it) }
         return builder.build()
     }
@@ -184,7 +185,7 @@ internal class VerboseJsonFormat {
     private fun serializeElementTiming(
         elementTiming: PerformanceElementTiming
     ): JsonObject = elementTiming.run {
-        return Json.createObjectBuilder()
+        return JSON.createObjectBuilder()
             .add("renderTime", renderTime.toString())
             .add("loadTime", loadTime.toString())
             .add("identifier", identifier)