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Slow webflux multipart upload #34651

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Slow webflux multipart upload#34651
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in: webIssues in web modules (web, webmvc, webflux, websocket)status: supersededAn issue that has been superseded by anothertype: enhancementA general enhancement
@sbxz

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@sbxz
sbxz
opened on Mar 25, 2025

Hello,

We are developing a document submission application using WebFlux. However, we have noticed that handling multipart requests is slower with WebFlux compared to MVC. For example, when using MultipartFile in MVC, sending a 200MB file takes about 700ms, whereas it takes 4.2s with WebFlux (FilePart) and 4.5s with PartEvent.

Did we miss something?

Here is a repository reproducing the issue: Repo

Spring boot version : 3.4.4
Java 21

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    in: webIssues in web modules (web, webmvc, webflux, websocket)status: supersededAn issue that has been superseded by anothertype: enhancementA general enhancement

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