https://github.com/quramy/reproduce-apollo-react-memleak

To reproduce react-apollo memory leak
https://github.com/quramy/reproduce-apollo-react-memleak

graphql react react-apollo server-side-rendering

Last synced: about 2 months ago
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To reproduce react-apollo memory leak

• Host: GitHub
• URL: https://github.com/quramy/reproduce-apollo-react-memleak
• Owner: Quramy
• Created: 2019-06-25T17:56:23.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2022-12-10T20:11:59.000Z (over 2 years ago)
• Last Synced: 2025-03-23T01:36:27.977Z (2 months ago)
• Topics: graphql, react, react-apollo, server-side-rendering
• Language: TypeScript
• Homepage:
• Size: 418 KB
• Stars: 1
• Watchers: 1
• Forks: 2
• Open Issues: 8
• Metadata Files:
  • Readme: README.md

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README

        
# Reproduce react-apollo memory leak

To reproduce https://github.com/apollographql/react-apollo/issues/2126 .

## Summary

I've measured heap size with 10,000 SSR request under the following condition.

All results indicate some memory increasing(about ~100 bytes / request).

### 1. No ApolloProvider, no apollo client

![](./graph_000_no_client.png)

### 2. No `` component

*Only instantiating an apollo client and rendering empty ``*

![](./graph_001_no_query.png)

### 3. Not using getDataFromTree

*Using `` but not waiting for the result*

![](./graph_002_no_data_from_tree.png)

### 4. Light query

![](./graph_003_light_query.png)

### 5. Large query

![](./graph_004_heavy_query.png)

## How to measure heap size

### Install and build apps

```sh

$ yarn --pure-lockfile

$ yarn build

```

### Draw heap size graph

First, start GraphQL server process:

```sh

$ yarn start-gql

```

Second, start SSR server process, which is the target to monitor:

```sh

$ yarn start-ssr

```

Next benchmark via ab command:

```sh

$ ab -n 1000 http://localhost:4010

```

After shutdown the SSR server process, `heap.json` will be generated.

Finally, plot a heap size graph via the following:

```sh

$ ./plot.py

```

### Dump heap snapshot

Send `SIGUSR1` to the SSR server process.