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Improve JetBrains port processing performance #20907

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Merged
merged 2 commits into from
Jun 17, 2025
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Improve JetBrains port processing performance #20907

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Improve JetBrains port processing performance
mustard-mh Jun 17, 2025
1b318f3
revert sdkman path
mustard-mh Jun 17, 2025
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22 changes: 21 additions & 1 deletion ...-plugin/src/main/kotlin/io/gitpod/jetbrains/remote/AbstractGitpodPortForwardingService.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import com.intellij.openapi.components.service
import com.intellij.openapi.diagnostic.thisLogger
import com.intellij.remoteDev.util.onTerminationOrNow
import com.intellij.ui.RowIcon
import com.intellij.util.Alarm
import com.intellij.util.application
import com.jetbrains.rd.platform.codeWithMe.portForwarding.*
import com.jetbrains.rd.util.URI
Expand All @@ -35,6 +36,11 @@ abstract class AbstractGitpodPortForwardingService : GitpodPortForwardingService
private val ignoredPortsForNotificationService = service<GitpodIgnoredPortsForNotificationService>()
private val lifetime = Lifetime.Eternal.createNested()

// Throttling mechanism to prevent rapid successive port updates using IntelliJ Alarm
private var pendingUpdate: Status.PortsStatusResponse? = null
private val updateAlarm = Alarm(Alarm.ThreadToUse.SWING_THREAD, this)
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Copilot AI Jun 17, 2025

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Using this as the parent Disposable may leak if AbstractGitpodPortForwardingService isn't disposable. Consider supplying a proper Disposable (e.g., the plugin’s lifecycle parent) or disposing the Alarm when the service shuts down.

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private val updateAlarm = Alarm(Alarm.ThreadToUse.SWING_THREAD, this)
private val updateAlarm = Alarm(Alarm.ThreadToUse.SWING_THREAD, application)

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private val updateThrottleMs = 100 // 100ms throttle
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Copilot AI Jun 17, 2025

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[nitpick] The throttle interval is a magic number here. Consider extracting it into a named constant or configuration entry so it’s easier to adjust and document.

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private val updateThrottleMs = 100 // 100ms throttle
private val updateThrottleMs = DEFAULT_UPDATE_THROTTLE_MS // Default throttle interval

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init { start() }

private fun start() {
Expand Down Expand Up @@ -86,7 +92,7 @@ abstract class AbstractGitpodPortForwardingService : GitpodPortForwardingService
}

override fun onNext(response: Status.PortsStatusResponse) {
application.invokeLater { syncPortsListWithClient(response) }
application.invokeLater { throttledSyncPortsListWithClient(response) }
}

override fun onCompleted() {
Expand All @@ -103,6 +109,20 @@ abstract class AbstractGitpodPortForwardingService : GitpodPortForwardingService
return completableFuture
}

private fun throttledSyncPortsListWithClient(response: Status.PortsStatusResponse) {
// Store the latest update (overwrites any pending update)
pendingUpdate = response

// Cancel any existing scheduled update and schedule a new one
if (!updateAlarm.isEmpty) {
updateAlarm.cancelAllRequests()
}
Comment on lines +117 to +119
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[nitpick] Checking isEmpty before cancelAllRequests() may be unnecessary, since cancelAllRequests() is idempotent. You could simplify by always calling cancelAllRequests() or guard by isDisposed if needed.

Suggested change
if (!updateAlarm.isEmpty) {
updateAlarm.cancelAllRequests()
}
updateAlarm.cancelAllRequests()

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updateAlarm.addRequest({
pendingUpdate?.let { syncPortsListWithClient(it) }
pendingUpdate = null
}, updateThrottleMs)
}

private fun isLocalPortForwardingDisabled(): Boolean {
return System.getenv("GITPOD_DISABLE_JETBRAINS_LOCAL_PORT_FORWARDING")?.toBoolean() ?: false
}
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