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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 36 |
1 files changed, 36 insertions, 0 deletions
@@ -1,3 +1,39 @@ +Sat Oct 24 02:02:24 2015 Koichi Sasada <ko1@atdot.net> + + * vm_insnhelper.c: introduce new call handler for simple ISeqs. + + vm_call_iseq_setup_normal_0start() is simple, however it has + some loops/conditions depends on ISeq::param.size and + ISeq::local_size (in vm_push_frame(), inlined into this function). + + There are many simple methods which has a few parameters and local + variables. So that this patch introduces several special functions + generated in vm_call_iseq_optimized.inc by + tool/mk_call_iseq_optimized.rb. + + This script makes + vm_call_iseq_setup_normal_0start_Xparams_Ylocals() + where X is 0 to 3 and Y is 1 to 6 (as current setting). + In this case, X * Y = 24 functions are created. + + These functions creates fast method dispatch by inlining + vm_push_frame() with immediate params/locals sizes. + + On my laptop, we can have the following results. + + vm2_method* 1.083 (8.3% faster) + vm2_poly_method* 0.961 (3.4% slower) + + It shows 8.3% faster for inner loop method dispatch (hit inline + cache), but 3.4% slower when inline cache miss because we need + to find a suitable call handler. + + * common.mk: add a rule for vm_call_iseq_optimized.inc. + + * tool/mk_call_iseq_optimized.rb: added. + + * vm.c: include vm_call_iseq_optimized.inc. + Sat Oct 24 01:58:50 2015 Koichi Sasada <ko1@atdot.net> * vm_core.h: define vm_call_handler. |