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World Congress 2026 Europe • Jul 9, 2026 • Session details

Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!

Manfred Bjørlin

Is your Go application secretly hoarding memory? Learn to identify and fix logical leaks, blocked goroutines, and improper slicing before silent OOM crashes bring down your service.

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#1 about 3 min

Speaker background and an agenda for the technical session

An overview of the developer's background alongside the planned concepts.

#2 about 3 min

Understanding the function stack and data heap

Temporary variables live on the fast execution stack while shared data remains stored securely on the slower memory heap.

#3 about 2 min

Defining logical memory leaks in managed applications

Memory leaks manifest logically in Go when data stays unintentionally referenced despite functioning garbage collectors.

#4 about 2 min

Examining memory allocation and heap size classes

Go manages empty heap space by subdividing pages into discrete size classes designed for variable requirements.

#5 about 1 min

Minimizing struct padding for optimal memory usage

Arranging internal struct fields by optimal size significantly diminishes unnecessary padding inserted for processing alignment boundaries.

#6 about 4 min

Mechanisms of the tri-color garbage collector algorithm

The runtime concurrently locates unused memory nodes by tracing graphs without necessitating drastic execution stops.

#7 about 2 min

Controlling bounded lifetimes for execution-heavy goroutines

Applying timeouts or wait groups bounds completions and limits indefinite stack build-up inside parallel routines.

#8 about 2 min

Avoiding heap migration for large struct allocations

Returning specific pointers or building nested structs automatically triggers underlying memory escape operations towards the heap.

#9 about 3 min

Mitigating reference retention when reslicing data arrays

Instantiating explicit clones instead of returning a smaller view prevents original massive arrays from unintentionally locking resources.

#10 about 3 min

Managing deferred file closures within execution loops

Failing to close files iteratively exhausts file descriptors and continuously piles executions endlessly across defer stacks.

#11 about 1 min

Preventing silent goroutine leaks through channel closures

Open channels actively force idle background listeners completely into indefinitely hanging runtime states unless properly terminated.

#12 about 2 min

Circumventing natural memory retention in dynamic maps

Deleted map elements drop pointers but natively withhold underlying storage footprints until manually triggered map reconstructions occur.

#13 about 1 min

Capping memory usage in global variable caches

Permanently referenced caches sidestep automatic garbage collections and require customized item limits regulating overarching capacities.

#14 about 3 min

Stopping unreferenced time tickers to prevent leaks

Historical environments left discarded timers helplessly stranded across internal queues if closures were not properly explicitly halted.

#15 about 1 min

Brief overview of experimental memory arenas implementation

Manual groupings of data fields were developed for explicit sizing models but halted amidst unresolved execution complications.

#16 about 2 min

Configuring benchmark testing defaults for execution timing

Running scalable benchmark tests precisely surfaces how functions absorb scaling workloads beyond simplistic compiler correctness checks.

#17 about 2 min

Inspecting live heap allocations through pprof profiling

Launching accessible endpoints immediately surfaces exact application behaviors directly mapping variable allocations via interactive dashboards.

#18 about 2 min

Wrapping up common golang memory retention practices

A consolidated checklist reinforcing precision loop techniques, functional object cleanup methods, and ongoing debugging observability workflows.

Matching moments

3:32 min

Isolating metaspace memory leaks with a minimal reproducer

Marco Sussitz Marco Sussitz · WWC Europe 2026

1:31 min

Profiling Java memory to uncover metaspace leaks

Marco Sussitz Marco Sussitz · WWC Europe 2026

6:00 min

Common memory vulnerabilities in managed and unmanaged environments

Rainer Stropek Rainer Stropek · WWC 2021

1:28 min

Fixing memory leak bugs by removing unused string constants

Marco Sussitz Marco Sussitz · WWC Europe 2026

1:23 min

Practical takeaways for investigating obscure runtime memory leaks

Marco Sussitz Marco Sussitz · WWC Europe 2026

8:29 min

Discussion on JIT memory parameters and cross-language benchmarking

Daniel Strmečki · LIVE

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