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Reduce pyodide.asm.js by factor of 2 with sed (#1500)

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Hood Chatham 2021-04-19 21:42:59 -04:00 committed by GitHub
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commit 3a16e56fa4
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@ -55,6 +55,14 @@ build/pyodide.asm.js: \
--exclude-file "*__pycache__*" \
--exclude-file "*/test/*" \
--exclude-file "*/tests/*"
# Strip out C++ symbols which all start __Z.
# There are 4821 of these and they have VERY VERY long names.
# Reduces size of pyodide.asm.js by a factor of 2.
# I messed around with striping more and could remove another 400kb or so
# but the regexes I got were generated.
# To show some stats on the symbols you can use the following:
# cat build/pyodide.asm.js | grep -ohE 'var _{0,5}.' | sort | uniq -c | sort -nr | head -n 20
sed -i -E 's/var __Z[^;]*;//g' build/pyodide.asm.js
date +"[%F %T] done building pyodide.asm.js."