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C51 Benchmarks

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XC16x/C16x/ST10 Benchmarks

Keil C51 Code Comparison

The following benchmarks compare the output generated by the Keil C51 Version 5, Version 6, and Version 8 8051 compilers. The source code used for the benchmarks is included with the C51 Evaluation Software.

Sieve Benchmarks	Compiler
Sieve Benchmarks	C51 V8.05	C51 V8.05	C51 V6.12	C51 V6.12	C51 V5.02
Settings
Memory Model	SMALL	SMALL	SMALL	SMALL	SMALL
ROM Model	LARGE	LARGE	LARGE	LARGE	LARGE
Optimization Level	9,SIZE	8,SPEED	9,SIZE	8,SPEED	6,SPEED
Performance
Execution Time 12MHz 8051					6.012 secs
Execution Time 25MHz 80C320					1.403 secs
Code Size Module					166 bytes
Code Size Total					1,240 bytes
DATA Size Dynamic					41 bytes

Sieve Benchmarks	Compiler
Sieve Benchmarks	C51 V8.05	C51 V8.05	C51 V6.12	C51 V6.12	C51 V5.02
Settings
Memory Model	LARGE	LARGE	LARGE	LARGE	LARGE
ROM Model	LARGE	LARGE	LARGE	LARGE	LARGE
Optimization Level	9,SIZE	8,SPEED	9,SIZE	8,SPEED	6,SPEED
Performance
Execution Time 12MHz 8051					7.460 secs
Execution Time 25MHz 80C320					1.743 secs
Code Size Module					209 bytes
Code Size Total					1,313 bytes
DATA Size Dynamic					22 bytes
XDATA Size Dynamic					8,237 bytes

Dhrystone Benchmarks	Compiler
Dhrystone Benchmarks	C51 V8.05	C51 V8.05	C51 V6.12	C51 V6.12	C51 V5.02
Settings
Memory Model	LARGE	LARGE	LARGE	LARGE	LARGE
ROM Model	LARGE	LARGE	LARGE	LARGE	LARGE
Optimization Level	9,SIZE	8,SPEED	9,SIZE	8,SPEED	6,SIZE
Performance
Execution Time 12MHz 8051		1.033 secs	1.112 secs	1.029 secs	1.096 secs
Execution Time 25MHz 80C320		0.178 secs	0.258 secs	0.234 secs	0.254 secs
Code Size Module		2,156 bytes	1,717 bytes	2,163 bytes	1,905 bytes
Code Size Total		5,607 bytes	5,197 bytes	5,614 bytes	5,269 bytes
XDATA Size Dynamic		5,523 bytes	5,523 bytes	5,523 bytes	5,538 bytes

Whetstone Benchmarks	Compiler
Whetstone Benchmarks	C51 V8.05	C51 V8.05	C51 V6.12	C51 V6.12	C51 V5.02
Settings
Memory Model	LARGE	LARGE	LARGE	LARGE	LARGE
ROM Model	LARGE	LARGE	LARGE	LARGE	LARGE
Optimization Level	9,SIZE	8,SPEED	9,SIZE	8,SPEED	6,SIZE
Performance
Execution Time 12MHz 8051			4.647 secs	4.445 secs	4.493 secs
Execution Time 25MHz 80C320			0.973 secs	0.915 secs	0.941 secs
Code Size Module			3,596 bytes	5,446 bytes	4,306 bytes
Code Size Total			186 bytes	186 bytes	189 bytes
XDATA Size Dynamic			8,618 bytes	10,486 bytes	9,236 bytes