faster-im.tex

% +++
% latex = "pdflatex"
% sequence = ["latex", "pdf2png", "png2gif"]
%
% [programs.pdf2png]
% command = "magick"
% opts = [
%   "%B.pdf",
%   "-background white",
%   "-alpha remove",
%   "-density 144",
% ]
% args = ["%B.png"]
%
% [programs.png2gif]
% command = "magick"
% opts = ["-delay 5"]
% args = [
%   "%B-0.png",
%   "%B-1.png",
%   "%B-2.png",
%   "%B-3.png",
%   "%B-4.png",
%   "%B-5.png",
%   "%B-6.png",
%   "%B-7.png",
%   "%B-8.png",
%   "%B-9.png",
%   "%B-10.png",
%   "%B-11.png",
%   "%B-12.png",
%   "%B-13.png",
%   "%B-14.png",
%   "%B-15.png",
%   "%B-16.png",
%   "%B-17.png",
%   "%B-18.png",
%   "%B-19.png",
%   "%B-20.png",
%   "%B-21.png",
%   "%B-22.png",
%   "%B-23.png",
%   "%B-24.png",
%   "%B-25.png",
%   "%B-26.png",
%   "%B-27.png",
%   "%B-28.png",
%   "%B-29.png",
%   "%B-30.png",
%   "%B-31.png",
%   "%B.gif"
% ]
% +++
\documentclass{article}
\usepackage[paperwidth=15cm, paperheight=15cm, margin=0cm]{geometry}
\usepackage[svgnames]{xcolor}
\usepackage{scsnowman}
\usepackage{tcfaspin}

\makeatletter
\chardef\faAllTicks=32
\chardef\faStopTicks=0

\long\def\beginframe#1\endframe{%
  #1\clearpage
  \edef\x{\noexpand\chardef\noexpand\faStopTicks
    =\number\numexpr\faStopTicks+1\relax}\x\relax
  \ifnum\faStopTicks<\faAllTicks\beginframe #1\endframe\fi}
\makeatother

\pagestyle{empty}

\begin{document}

\centering

\beginframe
\mbox{}\vfill
\faSpin{\scsnowman[scale=40,
  muffler=Red,hat=Green,buttons=RoyalBlue,
  arms=Brown,snow=SkyBlue]}%
\vfill
\endframe

\end{document}

faster.tex

% +++
% latex = "pdflatex"
% sequence = ["latex", "tex2img"]
% 
% [programs.tex2img]
% command = "tex2img"
% opts = [
%   "--resolution 5",
%   "--keep-page-size",
%   "--no-transparent",
%   "--delete-display-size",
%   "--merge-output-files",
%   '--animation-delay "0"',
% ]
% args = ["%B.pdf", "%B.gif"]
% +++
\documentclass{article}
\usepackage[paperwidth=15cm, paperheight=15cm, margin=0cm]{geometry}
\usepackage[svgnames]{xcolor}
\usepackage{scsnowman}
\usepackage{tcfaspin}

\makeatletter
\chardef\faAllTicks=32
\chardef\faStopTicks=0

\long\def\beginframe#1\endframe{%
  #1\clearpage
  \edef\x{\noexpand\chardef\noexpand\faStopTicks
    =\number\numexpr\faStopTicks+1\relax}\x\relax
  \ifnum\faStopTicks<\faAllTicks\beginframe #1\endframe\fi}
\makeatother

\pagestyle{empty}

\begin{document}

\centering

\beginframe
\mbox{}\vfill
\faSpin{\scsnowman[scale=40,
  muffler=Red,hat=Green,buttons=RoyalBlue,
  arms=Brown,snow=SkyBlue]}%
\vfill
\endframe

\end{document}

original.tex

% +++
% sequence = ["tcspingif"]
% [programs.tcspingif]
% command = "tcspingif"
% opts = ["-d 144", "-e pdflatex"]
% +++
\documentclass[margin=25pt]{standalone}
\usepackage[svgnames]{xcolor}
\usepackage{scsnowman}% ゆきだるま☃!
\usepackage{tcfaspin}% 回転!
\begin{document}
% \scsnowman を回転させる
\faSpin{\scsnowman[scale=40,
  muffler=Red,hat=Green,buttons=RoyalBlue,
  arms=Brown,snow=SkyBlue]}%
\end{document}

$ time llmk -s faster-im.tex
llmk -s faster-im.tex  15.94s user 3.72s system 218% cpu 9.017 total