neomantra

package main

import (
	"fmt"
	"math/rand"
	"os"
	"strings"
	"time"

	tea "charm.land/bubbletea/v2"

neomantra

#!/bin/bash
#
# This script is used to generate a version string for the go.mod replace directive.
# This is of the format version-timestamp-hash, where version is the current version of the module,
# timestamp is the current time in UTC, and hash is the short git hash of the current commit.
#
# This script emits the "version-timestamp-hash" based on the current git HEAD.
#
# If passed with an argument, that string is used as the version,
# otherwise "v0.0.0" is used as the default version.

neomantra

Last night we was my first time doing LLM-based performance engineering, and wow what fun! I token-maxxed $20 of Codex 5.5, then wrapped up with Opus 4.7, along with Gemini for some code reivew.

After six hours, I and a 165x improvement of PIXterm! What follow is the performance log we kept.

---

Performance Notes

2026-04-30: Baseline vs v1.3.2

neomantra

package curl

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
	"strconv"
	"strings"
	"unicode/utf8"

neomantra

# within DuckDB run these commands
# load the parquet ohlcv files, which start with syms
CREATE TABLE ohlcvs AS SELECT * FROM './syms*.parquet';

# load the publishers parquet
CREATE TABLE publishers AS SELECT * FROM './publishers.parquet';

# query for the top publisher_id for each date,ticker
# QUALIFY is DuckDB dialect 
SELECT date(ts_event),symbol,volume,close,P.dataset FROM ohlcvs O

neomantra

events {
  worker_connections  4096;  ## Default: 1024
}

http {
    # DEBUG:
    map $uri $proxy_uri_base {
        "~/crypto-proxy/(?<proxy_base>[^/]*)" $proxy_base;
        default $uri;
    }

neomantra

# Grafana PDC -- private network tunnel
# This is templated by Terraform templatefile()
# https://grafana.com/docs/grafana-cloud/connect-externally-hosted/private-data-source-connect/configure-pdc/

job "grafana-pdc" {
  region = "global"
  datacenters = ["${NOMAD_DATACENTER}"]
  namespace = "${NOMAD_NAMESPACE}"
  type = "service"

neomantra

// Copyright (c) 2024 Neomantra BV
//
// Opinionated Reader/Writer wrappers

package nmio

import (
	"compress/gzip"
	"io"
	"os"

neomantra

func VerifyDirectoryExists(dirPath string) error {
	if fileInfo, err := os.Stat(dirPath); err != nil {
		if os.IsNotExist(err) {
			return fmt.Errorf("directory '%s' does not exist", dirPath)
		} else {
			return fmt.Errorf("error filestat on '%s': %w", dirPath, err)
		}
	} else if !fileInfo.IsDir() {
		return fmt.Errorf("'%s' exists but is not a directory", dirPath)
	}

neomantra

// NewPointerValueMap converts a map[string]*T to a map[string]T, omitting nil pointers.
func NewPointerValueMap[K comparable, V any](src map[K]*V) map[K]V {
	dst := make(map[K]V)
	for k, ptr := range src {
		if ptr != nil {
			dst[k] = *ptr
		}
	}
	return dst
}