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Chez Scheme is a proprietary Scheme implementation by R. Kent Dybvig, first released in 1985, which uses incremental native-code compilation to produce native binaries for the PowerPC, SPARC, IA-32, and x86-64 processor architectures. Chez Scheme supports R6RS〔(【引用サイトリンク】title=Chez Scheme Version 8.0 Release Notes )〕 since version 7.9.1. Chez Scheme has a windowing and graphics package called the Scheme Widget Library, and is supported by the portable SLIB library. According to one series of benchmarks, In this particular series of benchmarks, Chez Scheme is among the fastest available Scheme implementations on the Sun SPARC processor architecture, while Petite Chez Scheme (see below) was shown as one of the slowest implementations on the more common x86 (Pentium 32 bit) processor architecture. Petite Chez Scheme is its sibling implementation which uses a threaded interpreter design in place of Chez Scheme's incremental native-code compiler. Programs written for Chez Scheme run unchanged in Petite Chez Scheme, as long as they do not depend specifically on the compiler (for example foreign function interface is only available in the compiler). Petite Chez Scheme is freely distributable and may be used without royalty fees, subject to the license agreement.〔(【引用サイトリンク】 Petite Chez Scheme Software License Agreement )〕 ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chez Scheme」の詳細全文を読む スポンサード リンク
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