Promise all async loops in Typescript
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
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Add this rule to wispbit and it will run when you open a pull request
Install this rule for Coderabbit
Copy the configuration below and add it to your repository as .coderabbit.yml
in your project root.
reviews:
path_instructions:
- path: "*.ts"
instructions: |
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
Install this rule for Greptile
Greptile rules can be added through the web interface. Please see this documentation for details on how to add custom rules and context.
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
File Path Patterns:
Install this rule for GitHub Copilot
Copilot instructions can be added through the interface. See the documentation for details on how to create coding guidelines.
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
File Path Patterns:
Install this rule for Graphite Diamond
Diamond custom rules can be added through the interface. See the documentation for details on how to create custom rules.
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
File Path Patterns:
Use with Cline
Copy the rule below and ask Cline to review your code using this rule
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
Use with OpenAI Codex
Copy the rule below and ask OpenAI Codex to review your code using this rule
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
Use with Cursor
Copy the rule below and ask Cursor to review your code using this rule
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
Use with Claude Code
Copy the rule below and ask Claude Code to review your code using this rule
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```
Install this rule for Windsurf
To set up rules for Windsurf Reviews, please see this documentation
Use `Promise.all` when processing multiple async operations in loops.
Bad:
```typescript
async function processItems(items: string[]) {
const results = []
for (const item of items) {
// Sequential execution - slower
const result = await fetchData(item)
results.push(result)
}
return results
}
```
Good:
```typescript
async function processItems(items: string[]) {
// Parallel execution - faster
const results = await Promise.all(
items.map(async (item) => {
return await fetchData(item)
})
)
return results
}
```