source: tests/zombies/string-perf/pbx-correctness-demos.cfa @ 58e2ce34

Last change on this file since 58e2ce34 was 08ed947, checked in by Michael Brooks <mlbrooks@…>, 3 years ago

Roll up of string changes for performance testing/improvement, and a couple API features supporting them.

String API changes:
Defining a tuning knob to control the heap growth policy (relapaces former 10% hardcode, downgraded to a default)
Implementing findFrom (allowing find-non-first); leaving find as find-first.

String implementation perf improvements:
Calling C-malloc directly instead of via CFA-alloc.
Replacings loops that copy with memmove calls.
Replacings loops that search for a value with memchr calls.

String perf testing realized:
Makefile supporting several prog-*.cfa, chosen by OPERATION value (implies prog.cfa changes to support the adjusted protocol)
Adjusting the starter/accumulater declarations in PEQ and PTA to behave consistently in cfa v cpp.
Adding tests: allocation, find, normalize, pass-by-val, pass-by-x.
Adding helper shell scripts for: generating flame graphs, collecting/crunching allocation stats using Mubeen's malloc wrappers
  • Property mode set to 100644
File size: 6.6 KB
Line 
1// see also C++ investigation in ~/plg2/cfa2/mycode/string/raii/ctor-calls.cpp
2
3#include <string.hfa>
4#include <string_res.hfa>
5
6/*
7call_substrOfPart:
8    In all cases, of both HL and LL, there is a temporary object.
9    It represents narrowing the range, from full-string, to [1..3].
10    The only matter to control is whether that temporary shares edits with the string from which it was created.
11    In HL, two knobs control it, and the
12*/
13
14void calltest_HL() {
15
16    #define HELPER_BODY(param) \
17        sout | "early in helper with " | param; \
18        param[0] = '+'; \
19        sout | "late in helper with " | param;
20
21    void helper1( string   q ) { HELPER_BODY(q) }
22    void helper2( string & q ) { HELPER_BODY(q) }
23    #undef HELPER_BODY
24
25    string fred;
26
27
28    sout | "===";
29    sout | "HL: substring of part";
30
31    sout | "---";
32    // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
33    fred = "abcd";
34    sout | "before helper with " | fred;
35    helper1( fred(1,3) );
36    sout | "after helper with " | fred;
37
38    sout | "---";
39    // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
40    fred = "abcd";
41    sout | "before helper with " | fred;
42    helper2( fred(1,3) );
43    sout | "after helper with " | fred;
44
45    sout | "---";
46    // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
47    fred = "abcd";
48    sout | "before helper with " | fred;
49    helper2( (string){ fred(1,3) } );
50    sout | "after helper with " | fred;
51
52
53    sout | "===";
54    sout | "HL: substring of whole";
55
56    sout | "---";
57    // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
58    fred = "abcd";
59    sout | "before helper with " | fred;
60    helper1( fred(0,4) );
61    sout | "after helper with " | fred;
62
63    sout | "---";
64    // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
65    fred = "abcd";
66    sout | "before helper with " | fred;
67    helper2( fred(0,4) );
68    sout | "after helper with " | fred;
69
70    sout | "---";
71    // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
72    fred = "abcd";
73    sout | "before helper with " | fred;
74    helper2( (string){ fred(0,4) } );
75    sout | "after helper with " | fred;
76
77
78
79    sout | "===";
80    sout | "HL: whole original string";
81
82    sout | "---";
83    // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
84    fred = "abcd";
85    sout | "before helper with " | fred;
86    helper1( fred );
87    sout | "after helper with " | fred;
88
89    sout | "---";
90    // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
91    fred = "abcd";
92    sout | "before helper with " | fred;
93    helper2( fred );
94    sout | "after helper with " | fred;
95
96    sout | "---";
97    // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
98    fred = "abcd";
99    sout | "before helper with " | fred;
100    helper2( (string){ fred } );
101    sout | "after helper with " | fred;
102}
103
104void calltest_LL() {
105
106    #define HELPER_BODY(param) \
107        sout | "early in helper with " | param; \
108        assignAt(param, 0, '+'); \
109        sout | "late in helper with " | param;
110
111    void helper1( string_res & q ) { HELPER_BODY(q) } // arg should always be a temporary constructed with COPY_VALUE
112    void helper2( string_res & q ) { HELPER_BODY(q) } // arg can refer to whatever you want
113    #undef HELPER_BODY
114
115    /*
116    In LL, both functions are translated to the same thing.
117    "The only allowed call of #1" becomes respecting the restriction of the comment at helper1.
118    A sys call of #2 is different from the only allowed call of #1.
119    A trans call of #2 is the same as the only allowed call of #1.
120    */
121
122    string_res fred;
123
124    sout | "===";
125    sout | "LL: substring of part";
126
127    sout | "---";
128    // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
129    fred = "abcd";
130    sout | "before helper with " | fred;
131    helper1( (string_res){ fred, COPY_VALUE, 1, 3 } );
132    sout | "after helper with " | fred;
133
134    sout | "---";
135    // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
136    fred = "abcd";
137    sout | "before helper with " | fred;
138    helper2( (string_res){ fred, SHARE_EDITS, 1, 3 } );
139    sout | "after helper with " | fred;
140
141    sout | "---";
142    // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
143    fred = "abcd";
144    sout | "before helper with " | fred;
145    helper2( (string_res){ fred, COPY_VALUE, 1, 3 } );
146    sout | "after helper with " | fred;
147
148
149    sout | "===";
150    sout | "LL: substring of whole";
151
152    sout | "---";
153    // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
154    fred = "abcd";
155    sout | "before helper with " | fred;
156    helper1( (string_res){ fred, COPY_VALUE, 0, 4 } );
157    sout | "after helper with " | fred;
158
159    sout | "---";
160    // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
161    fred = "abcd";
162    sout | "before helper with " | fred;
163    helper2( (string_res){ fred, SHARE_EDITS, 0, 4 } );
164    sout | "after helper with " | fred;
165
166    sout | "---";
167    // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
168    fred = "abcd";
169    sout | "before helper with " | fred;
170    helper2( (string_res){ fred, COPY_VALUE, 0, 4 } );
171    sout | "after helper with " | fred;
172
173
174    sout | "===";
175    sout | "LL: whole original string";
176
177    sout | "---";
178    // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
179    fred = "abcd";
180    sout | "before helper with " | fred;
181    helper1( (string_res){ fred, COPY_VALUE } );
182    sout | "after helper with " | fred;
183
184    sout | "---";
185    // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
186    fred = "abcd";
187    sout | "before helper with " | fred;
188    helper2( fred );
189    sout | "after helper with " | fred;
190
191    sout | "---";
192    // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
193    fred = "abcd";
194    sout | "before helper with " | fred;
195    helper2( (string_res){ fred, COPY_VALUE } );
196    sout | "after helper with " | fred;
197}
198
199
200
201int main() {
202
203    calltest_HL();
204    calltest_LL();
205
206}
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