From c9b544ab55f017ce80f5a9fb9491a9d96a6b79c4 Mon Sep 17 00:00:00 2001
From: Davide Scaini <davide.scaini@alumni.cern>
Date: Sun, 24 May 2026 19:02:08 +0200
Subject: [PATCH] =?UTF-8?q?perf:=20throttle=20OG=20image=20generation=20?=
 =?UTF-8?q?=E2=80=94=20nice=2019=20+=2050ms=20sleep=20between=20renders?=
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---
 bincio/serve/tasks.py         | 2 ++
 scripts/generate_og_images.py | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/bincio/serve/tasks.py b/bincio/serve/tasks.py
index d25e9e5..39ff5dd 100644
--- a/bincio/serve/tasks.py
+++ b/bincio/serve/tasks.py
@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import logging
+import os
 import shutil
 import subprocess
 import threading
@@ -102,6 +103,7 @@ def _site_rebuild_worker() -> None:
                          "--www-root", _webroot],
                         capture_output=True,
                         text=True,
+                        preexec_fn=lambda: os.nice(19),
                     )
                     if og.returncode != 0:
                         log.error("site-rebuild: og-images failed (rc=%d):\n%s\n%s",
diff --git a/scripts/generate_og_images.py b/scripts/generate_og_images.py
index fb80aad..e4f2992 100644
--- a/scripts/generate_og_images.py
+++ b/scripts/generate_og_images.py
@@ -13,6 +13,7 @@ from __future__ import annotations
 import argparse
 import json
 import sys
+import time
 from pathlib import Path
 
 
@@ -58,6 +59,7 @@ def generate_all(data_dir: Path, www_root: Path) -> None:
                 out_path.write_bytes(png)
                 generated += 1
                 u_gen     += 1
+                time.sleep(0.05)
             except Exception as exc:
                 errors += 1
                 u_err  += 1