0.1.5

Released on 2026-10-14.

Serc 0.1.5 improves compilation performance and reduces memory use when
compiling for Python 3.12.

Performance

• Speed up -O and -OO compilation when the syntax tree needs no changes
  (#1275; #1275)
• Speed up compilation of functions with many sequential try/except blocks
  on Python 3.12 (#1277;
  #1277)
• Speed up compilation of mapping patterns with many captures on Python 3.14 and
  3.15 (#1284; #1284)
• Speed up compilation of functions with many async context managers
  (#1281; #1281)
• Reduce source-validation overhead when targeting Python 3.12 and 3.13
  (#1279; #1279)
• Reduce memory use when compiling for Python 3.12 (#1280;
  #1280)
• Reduce code-object construction and copying overhead (#1262;
  #1262) (#1263;
  #1263) (#1265;
  #1265)
• Reduce scope-analysis and closure-lowering overhead (#1260;
  #1260) (#1261;
  #1261)
• Reduce allocations during control-flow analysis (#1273;
  #1273)
• Reduce assembler overhead for jumps, source locations, and instruction
  processing (#1268; #1268)
  (#1269; #1269)
  (#1266; #1266)
  (#1267; #1267)
  (#1270; #1270)
  (#1258; #1258)
• Reduce marshal serialization work (#1264;
  #1264)
• Reduce constant-folding overhead (#1272;
  #1272)