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C++Builder's Compilers Performance Analysis

This topic will show some HydroByte internal experience with C++Builder's compilers performance.

Application

Tests were ran with an C++ console application called HydroChannel.

HydroChannel is an application that solves typical open channel design problems. One of the most intensive calculation modules solves the problem of a channel connecting two reservoirs. It produces a table called Delivery Curve. For each cell from this table, the computational solution involves a non deterministic and iterative solution of a differential equation guided by an optimization root-find model based on Newton's method.

Code

  • 13 CPP units with 4902 LOC.
  • 1 Object Pascal unit with 1862 LOC.
  • Total of 6764 LOC.

Compilers

  • bcc32: Windows 32-bits Classic (Borland) Compiler.
  • bcc32c: Windows 32-bits Old Clang Toolchain.
  • bcc64: Windows 64-bits Old Clang Toolchain.
  • bcc64x: Windows 64-bits New Clang Toolchain (C++Builder 12.2).

IDE

  • C++Builder 12.2.2 (+Patch).

Machine

  • Intel i5-8250U 1.66 GHz Base, 3.40 GHz TurboBoost (4 cores, 8 threads).
  • 8 Gb RAM.
  • Windows 11 23H2 (22631.4460).

Compilation tests

Build bcc32 bcc32c bcc64 bcc64x
Release 2.77 s 26.23 s 26.63 s 11.77 s
Release + TC 3.43 s 9.59 s 10.34 s 14.33 s
  • Average time for 4 repetitions and the worst was ruled out.
  • TC: TwineCompile 5.8
  • bcc64x: Build dialog does not show compilation progress properly (freezes).

Execution tests

Tested a Delivery Curve computation with 21 collumns and 532 rows that represents the solution of 11178 iterative Reservoir-Channel-Reservoir discharge problems.

Build bcc32 bcc32c bcc64 bcc64x
Release 2.005 s 1.026 s .735 s .448 s
  • Average time for 4 repetitions and the worst was ruled out.