Preallocate memory to reduce GC load #32905
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Signed-off-by: Florian Lehner <florian.lehner@elastic.co>
Signed-off-by: Florian Lehner <florian.lehner@elastic.co>
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CI failures are not related to the changes in this PR, it's a known problem with metricbeat. |
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…ackaging * upstream/main: (109 commits) Add cap_net_raw requirements to heartbeat docs (elastic#32816) apply a quick hotfix for having main working properly (elastic#32934) action: checks for x-pack/libbeat and libbeat (elastic#32754) Update to Go 1.18 in go.mod. (elastic#32940) [heartbeat] disable browser code on windows via build tags (elastic#32939) action: checks for heartbeat and x-pack/heartbeat (elastic#32749) Make event acknowledgment asynchronous in shipper output (elastic#32785) [Automation] Update elastic stack version to 8.5.0-fedc3e60 for testing (elastic#32930) Preallocate memory to reduce GC load (elastic#32905) [Automation] Update elastic stack version to 8.5.0-440e0896 for testing (elastic#32919) Skip broken ceph tests. (elastic#32912) Use non-deprecated docker image for testing jolokia (elastic#32885) update ironbank image product name (elastic#32867) ci: pre-commit stage within Jenkins (elastic#32839) Fix a couple of bugs in the logic for how AWS metric periods are calculated (elastic#32724) [Filebeat] [httpjson] Add support for single string containing multiple relation-types in getRFC5988Link (elastic#32811) [Heartbeat] Update HB k8s template to use <Mi> metric (elastic#32801) action: checks for metricbeat and x-pack/metricbeat (elastic#32748) action: checks for filebeat and x-pack/filebeat (elastic#32746) allow for json/ndjson content type with charset (elastic#32767) ...
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Preallocating memory reduces the load Go needs to handle and track allocated memory regions. This also reduces GC load. Signed-off-by: Florian Lehner <florian.lehner@elastic.co>
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What does this PR do?
Preallocating memory reduces the load Go needs to handle and track allocated memory regions. This also reduces GC load.
Why is it important?
While Go takes care of memory operations, like allocating, resizing and freeing, it is a good style to let Go know in advance the final required size to reduce the load of these operations.
Checklist
I have commented my code, particularly in hard-to-understand areasI have made corresponding changes to the documentationI have made corresponding change to the default configuration filesI have added tests that prove my fix is effective or that my feature worksI have added an entry inCHANGELOG.next.asciidocorCHANGELOG-developer.next.asciidoc.