query: performance optimization C++ program

intent: optimizing a C++ application

output: lex

output: "C++ performance" optimization -sports -athlete

output: lex

output: "memory allocation" "cache miss" profiling

output: vec

output: how to improve the runtime performance of a C++ program

output: hyde

output: C++ performance optimization involves profiling with tools like perf or valgrind, reducing memory allocations, improving cache locality, and avoiding unnecessary copies. Key techniques include move semantics, reserve on vectors, and SIMD intrinsics for hot loops.


query: python memory leak debugging

intent: debugging a Python application

output: lex

output: "memory leak" python -java -javascript

output: lex

output: "garbage collector" reference counting tracemalloc

output: vec

output: how to find and fix memory leaks in a Python application

output: hyde

output: Python memory leaks often occur when objects hold references longer than expected, preventing garbage collection. Use tracemalloc or memory_profiler to track allocations over time. Common causes include circular references, global caches, and event listeners that aren't removed.


query: connection pool exhaustion database

intent: debugging database connectivity issues

output: lex

output: "connection pool" exhausted timeout -redis -cache

output: lex

output: "max connections" database pool overflow

output: vec

output: why does the database connection pool run out of connections under load

output: hyde

output: Connection pool exhaustion occurs when all connections are checked out and new requests must wait or fail. This typically happens when queries run slowly, connections aren't released properly, or traffic spikes beyond pool capacity. Fix by increasing pool size, setting connection timeouts, or optimizing slow queries.


query: rate limiting API implementation

intent: implementing rate limiting in a backend service

output: lex

output: "rate limit" "token bucket" OR "sliding window" -ethereum -cryptocurrency

output: lex

output: "requests per second" throttle middleware

output: vec

output: how to implement rate limiting for an API endpoint

output: hyde

output: A token bucket rate limiter grants each client N tokens per time window. Each request consumes one token. When tokens run out, requests are rejected with 429 Too Many Requests. Tokens refill at a fixed rate. This allows short bursts while enforcing long-term average rate limits.


query: SQL query performance slow

intent: optimizing a slow database query

output: lex

output: "query plan" index scan "full table" slow -nosql -mongodb

output: lex

output: "missing index" "N+1" joins optimization

output: vec

output: why is my SQL query running slowly and how do I optimize it

output: hyde

output: Slow SQL queries are usually caused by missing indexes, full table scans, or N+1 query patterns. Use EXPLAIN ANALYZE to view the query plan. Add indexes on columns used in WHERE, JOIN, and ORDER BY clauses. Avoid SELECT * and fetch only the columns needed.


query: machine learning model overfitting

intent: training a machine learning model

output: lex

output: "overfitting" "validation loss" regularization -sports -fitness

output: lex

output: dropout "weight decay" "early stopping" training

output: vec

output: how to detect and prevent overfitting in a machine learning model

output: hyde

output: Overfitting occurs when a model memorizes training data instead of learning generalizable patterns, leading to high training accuracy but poor validation performance. Prevention techniques include dropout, L1/L2 regularization, data augmentation, and early stopping based on validation loss.


query: docker container networking

intent: configuring Docker networking

output: lex

output: "docker network" bridge overlay -kubernetes -k8s

output: lex

output: "container ip" "port mapping" expose publish

output: vec

output: how do Docker containers communicate with each other on the same host

output: hyde

output: Docker containers on the same host communicate via bridge networks. By default, containers on the bridge network can reach each other by IP. Use docker network create to make named networks, then --network flag to attach containers. Services can reference each other by container name as DNS hostname.


query: authentication token JWT

intent: implementing JWT authentication

output: lex

output: "JWT" "json web token" "secret key" -oauth -saml

output: lex

output: "bearer token" signature expiry claims

output: vec

output: how does JWT authentication work and how do I validate a token

output: hyde

output: JWT tokens consist of three base64-encoded parts: header (algorithm), payload (claims like user id and expiry), and signature. The server validates the signature using a secret key and checks that the token hasn't expired. Never store sensitive data in the payload as it's only encoded, not encrypted.


query: async await error handling javascript

intent: writing async JavaScript code

output: lex

output: "async" "await" "try catch" promise -python -rust

output: lex

output: "unhandled rejection" "error boundary" async

output: vec

output: how to properly handle errors in async/await JavaScript functions

output: hyde

output: Wrap await calls in try/catch blocks to handle rejections. Unhandled promise rejections crash Node.js processes. For parallel operations, use Promise.allSettled() instead of Promise.all() to handle partial failures. Always chain .catch() or use try/catch — never leave promises floating.


query: git merge conflict resolution

intent: resolving a git merge conflict

output: lex

output: "merge conflict" "<<<<<<" rebase resolution -github -gitlab

output: lex

output: "conflict markers" "ours" "theirs" checkout

output: vec

output: how do I resolve a git merge conflict between two branches

output: hyde

output: Git merge conflicts occur when two branches change the same lines. Conflict markers show both versions: <<<<<<< HEAD (your changes), ======= (separator), and >>>>>>> branch-name (incoming). Edit the file to keep the correct version, remove the markers, then git add and git commit to complete the merge.


query: kubernetes pod crashloopbackoff

intent: debugging a Kubernetes deployment

output: lex

output: "CrashLoopBackOff" pod logs restart -docker -vagrant

output: lex

output: "container failed" liveness probe startup

output: vec

output: why is my Kubernetes pod stuck in CrashLoopBackOff and how do I fix it

output: hyde

output: CrashLoopBackOff means the container keeps crashing and Kubernetes is backing off restarts exponentially. Check logs with kubectl logs --previous to see the last crash output. Common causes: misconfigured environment variables, missing secrets, failed liveness probes, or an application crash on startup.


query: react state management redux

intent: managing state in a React application

output: lex

output: "Redux" "useReducer" "action creator" -angular -vue

output: lex

output: "store dispatch" "selector" "middleware" thunk

output: vec

output: when should I use Redux versus local React state for state management

output: hyde

output: Redux is best for state shared across many components or that needs to persist across routes. Local useState is fine for UI state scoped to one component. For medium complexity, useContext + useReducer avoids Redux boilerplate. Redux shines for large apps with complex update logic, time-travel debugging, or middleware needs.