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Bartlomiej Plotka bwplotka

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Coding.. Building.. Deploying!
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@bwplotka
bwplotka / metrics-pr.txt
Created February 11, 2026 08:10
Prombench #18036 (same Prometheus version running side-by-side) /metrics (ms away) from A and B where B shows more CPU used for some reasons.
# HELP go_gc_cycles_automatic_gc_cycles_total Count of completed GC cycles generated by the Go runtime. Sourced from /gc/cycles/automatic:gc-cycles.
# TYPE go_gc_cycles_automatic_gc_cycles_total counter
go_gc_cycles_automatic_gc_cycles_total 1523
# HELP go_gc_cycles_forced_gc_cycles_total Count of completed GC cycles forced by the application. Sourced from /gc/cycles/forced:gc-cycles.
# TYPE go_gc_cycles_forced_gc_cycles_total counter
go_gc_cycles_forced_gc_cycles_total 0
# HELP go_gc_cycles_total_gc_cycles_total Count of all completed GC cycles. Sourced from /gc/cycles/total:gc-cycles.
# TYPE go_gc_cycles_total_gc_cycles_total counter
go_gc_cycles_total_gc_cycles_total 1523
# HELP go_gc_duration_seconds A summary of the wall-time pause (stop-the-world) duration in garbage collection cycles.
@bwplotka
bwplotka / Makefile
Last active September 9, 2025 06:26
quizes_total{} 1: Why "make check" will never detect any formatting errors?
.DEFAULT_GOAL := fmt
MD_FILES_TO_FORMAT=$(shell find . -name "*.md")
.PHONY: fmt
fmt: ## Format docs.
fmt:
@echo "Formatting markdown files..."
# <command that correctly formats $(MD_FILES_TO_FORMAT) files>
.PHONY: check
@bwplotka
bwplotka / compat_test.go
Created June 23, 2025 07:42
Prometheus TSDB Block Compatibility
package test
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"os"
"os/exec"
@bwplotka
bwplotka / secrets2_test.go
Last active April 16, 2025 11:27
# 47 // 1. Dynamic provider fields VS per provider sections. // 2. Field with the dynamic "inline OR providers" type VS separate fields for inline, file and providers.
package yolo
import (
"context"
"testing"
"github.com/google/go-cmp/cmp"
// Ecosystem is moving away from "gopkg.in/yaml.v2", so let's use what will be used long term
// (does not matter much).
@bwplotka
bwplotka / gitbigobj.sh
Created January 5, 2021 10:56
List biggest objects in your git history to answer question: "Why my git repo is so large even though I have only small files in main/master?"
#!/bin/bash
#set -x
# Shows you the largest objects in your repo's pack file.
# Written for osx.
#
# @see https://stubbisms.wordpress.com/2009/07/10/git-script-to-show-largest-pack-objects-and-trim-your-waist-line/
# @author Antony Stubbs
# set the internal field separator to line break, so that we can iterate easily over the verify-pack output
@bwplotka
bwplotka / e2e_store_and_querier.test
Created December 8, 2020 16:09
e2e benchmarking Thanos run up.
// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package e2e_test
import (
"context"
"fmt"
"net"
"net/http"
@bwplotka
bwplotka / bucket_test.go
Last active December 19, 2020 09:52
Thanos Go Benchmarks Real Block Queries
// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package manual
import (
"context"
"io/ioutil"
"os"
"testing"
@bwplotka
bwplotka / bench.sh
Last active November 17, 2020 19:21
Bartek's YOLO Go benchmarking scripts.
#!/usr/bin/env bash
set -e
# Copyright (c) Bartłomiej Płotka @bwplotka
# Licensed under the Apache License 2.0.
# Yolo script allowing nice benchmark framework for iterative work on Go performance.
# Requirements:
# * Prepare worktree if you want to benchmark in background: git worktree add ../thanos_b yolo
@bwplotka
bwplotka / replayable.go
Last active May 14, 2020 17:17
Go Replayable io.Reader: Useful when you want to share slice of bytes across many io.Reader sequential consumers). E.g the same reqest.Body in HTTP server used by multiple RoundTrippers (!).
package replayable
import (
"bytes"
"io"
)
type Reader struct {
wrapped io.Reader
@bwplotka
bwplotka / defer_benchmark.go
Last active February 20, 2020 11:53
Showcase of Go "1.14beta1" vs "1.13.1" `defer` performance improvement.
package main
import (
"testing"
)
var sink1 = 0
func BenchmarkNotDefered(b *testing.B) {
for n := 0; n < b.N; n++ {