Profiling results ----------------- Total cpu time observed: 41424ms (out of 41908ms) Number of samples taken: 181 (once every 229ms) ======================================================================= Caller Idx Total Self Name+src Local% ms(pct) ms(pct) Callee ======================================================================= ??? [29] 100.0% [1] 40180(97.0%) 0(0.0%) profile-thunk14 ...t/pkgs/profile-lib/main.rkt:9:0 run [7] 100.0% ----------------------------------------------------------------------- ??? [29] 100.0% [2] 10720(25.9%) 0(0.0%) run-improve58 ...ock/herbie/src/mainloop.rkt:242:0 for-loop [8] 89.9% loop [33] 6.3% get-final-combination [11] 3.8% ----------------------------------------------------------------------- loop [64] 4.6% ??? [29] 95.4% [3] 8808(21.3%) 0(0.0%) simplify ...lock/herbie/src/core/simplify.rkt:39:0 simplify-expr [9] 46.6% for-loop [10] 34.5% iterate-egraph!5 [14] 18.9% ----------------------------------------------------------------------- hash-ref! [77] 100.0% [4] 430(1.0%) 0(0.0%) f6 ...et/collects/racket/match/compiler.rkt:499:40 map [56] 100.0% ----------------------------------------------------------------------- hash-ref! [77] 100.0% [5] 204(0.5%) 0(0.0%) ??? .../ztatlock/herbie/src/core/taylor.rkt:338:33 for-loop [12] 100.0% ----------------------------------------------------------------------- hash-ref! [77] 100.0% [6] 192(0.5%) 0(0.0%) ??? /home/ztatlock/herbie/src/programs.rkt:197:5 loop [64] 100.0% ----------------------------------------------------------------------- profile-thunk14 [1] 100.0% [7] 40180(97.0%) 0(0.0%) run ...share/racket/pkgs/profile-lib/main.rkt:31:2 ??? [29] 100.0% ----------------------------------------------------------------------- run-improve58 [2] 100.0% [8] 9642(23.3%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:253:8 run-iter! [13] 100.0% ----------------------------------------------------------------------- simplify [3] 100.0% [9] 4104(9.9%) 0(0.0%) simplify-expr ...herbie/src/core/simplify.rkt:68:0 iterate-egraph!5 [14] 100.0% ----------------------------------------------------------------------- simplify [3] 100.0% [10] 3038(7.3%) 0(0.0%) for-loop ...ock/herbie/src/core/simplify.rkt:61:12 iterate-egraph!5 [14] 92.7% mk-egraph [16] 7.3% ----------------------------------------------------------------------- run-improve58 [2] 100.0% [11] 404(1.0%) 0(0.0%) get-final-combination ...ie/src/mainloop.rkt:269:0 extract-alt [15] 100.0% ----------------------------------------------------------------------- ??? [5] 100.0% [12] 204(0.5%) 0(0.0%) for-loop ...lock/herbie/src/core/taylor.rkt:341:46 hash-ref! [77] 100.0% ----------------------------------------------------------------------- for-loop [8] 100.0% [13] 9642(23.3%) 0(0.0%) run-iter! ...tatlock/herbie/src/mainloop.rkt:223:0 simplify! [17] 87.2% finalize-iter! [19] 6.3% localize-error [21] 4.5% gen-series! [23] 2.1% ----------------------------------------------------------------------- simplify [3] 19.4% for-loop [10] 32.8% simplify-expr [9] 47.8% [14] 8586(20.7%) 0(0.0%) iterate-egraph!5 ...bie/src/core/simplify.rkt:95:0 one-iter [18] 94.6% map-enodes [20] 5.4% ----------------------------------------------------------------------- get-final-combination [11] 100.0% [15] 404(1.0%) 0(0.0%) extract-alt ...e/ztatlock/herbie/src/glue.rkt:57:0 loop [64] 100.0% ----------------------------------------------------------------------- for-loop [10] 100.0% [16] 222(0.5%) 0(0.0%) mk-egraph ...lock/herbie/src/core/egraph.rkt:123:0 expr->enode [22] 100.0% ----------------------------------------------------------------------- run-iter! [13] 100.0% [17] 8404(20.3%) 0(0.0%) simplify! ...tatlock/herbie/src/mainloop.rkt:162:0 for-loop [24] 100.0% ----------------------------------------------------------------------- iterate-egraph!5 [14] 100.0% [18] 8124(19.6%) 0(0.0%) one-iter ...ock/herbie/src/core/simplify.rkt:106:0 loop [25] 51.2% for-loop [26] 43.5% apply-match [30] 5.2% ----------------------------------------------------------------------- run-iter! [13] 100.0% [19] 604(1.5%) 0(0.0%) finalize-iter! ...ck/herbie/src/mainloop.rkt:177:0 ??? [27] 100.0% ----------------------------------------------------------------------- iterate-egraph!5 [14] 100.0% [20] 462(1.1%) 0(0.0%) map-enodes ...ock/herbie/src/core/egraph.rkt:139:0 loop [64] 100.0% ----------------------------------------------------------------------- run-iter! [13] 100.0% [21] 430(1.0%) 0(0.0%) localize-error ...erbie/src/core/localize.rkt:47:0 hash-ref! [77] 100.0% ----------------------------------------------------------------------- mk-egraph [16] 100.0% [22] 222(0.5%) 0(0.0%) expr->enode ...ck/herbie/src/core/egraph.rkt:124:2 mk-enode! [50] 100.0% ----------------------------------------------------------------------- run-iter! [13] 100.0% [23] 204(0.5%) 0(0.0%) gen-series! ...tlock/herbie/src/mainloop.rkt:134:0 for-loop [28] 100.0% ----------------------------------------------------------------------- simplify! [17] 100.0% [24] 8404(20.3%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:166:6 ??? [29] 100.0% ----------------------------------------------------------------------- one-iter [18] 100.0% [25] 4162(10.0%) 0(0.0%) loop ...cket/collects/racket/private/map.rkt:53:19 apply-match [30] 100.0% ----------------------------------------------------------------------- for-loop [26] 50.0% one-iter [18] 50.0% [26] 3538(8.5%) 1168(2.8%) for-loop ...ck/herbie/src/core/simplify.rkt:116:12 for-loop [26] 50.0% match-e [34] 33.5% ----------------------------------------------------------------------- finalize-iter! [19] 100.0% [27] 604(1.5%) 0(0.0%) ??? ...contract/private/arrow-val-first.rkt:357:18 for-loop [31] 100.0% ----------------------------------------------------------------------- gen-series! [23] 100.0% [28] 204(0.5%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:140:7 taylor-alt [32] 100.0% ----------------------------------------------------------------------- for-loop [24] 7.0% run [7] 45.5% [29] 41202(99.5%) 0(0.0%) ??? ...lects/racket/private/more-scheme.rkt:261:28 profile-thunk14 [1] 45.5% loop [33] 37.5% run-improve58 [2] 10.0% simplify [3] 7.0% ----------------------------------------------------------------------- one-iter [18] 9.2% loop [25] 90.8% [30] 4586(11.1%) 0(0.0%) apply-match .../herbie/src/core/simplify.rkt:122:2 merge-egraph-nodes! [39] 44.3% for-loop [35] 18.8% match-e [34] 14.4% loop! [69] 9.2% update-leader! [48] 8.8% substitute-e [41] 4.4% ----------------------------------------------------------------------- ??? [27] 100.0% [31] 604(1.5%) 0(0.0%) for-loop ...ock/herbie/src/core/alt-table.rkt:51:2 atab-add-altn [36] 100.0% ----------------------------------------------------------------------- for-loop [28] 100.0% [32] 204(0.5%) 0(0.0%) taylor-alt ...e/ztatlock/herbie/src/glue.rkt:142:0 for-loop [37] 100.0% ----------------------------------------------------------------------- run-improve58 [2] 2.2% ??? [29] 97.8% [33] 31156(75.2%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:122:2 make-exacts* [46] 57.2% loop [38] 41.4% loop [47] 1.4% ----------------------------------------------------------------------- for-loop [49] 11.0% apply-match [30] 18.2% for-loop [26] 70.8% [34] 3032(7.3%) 2170(5.2%) match-e ...tatlock/herbie/src/core/ematch.rkt:46:0 for-loop [40] 24.5% list-cartesian-product [43] 7.3% for-loop [49] 3.7% ----------------------------------------------------------------------- apply-match [30] 100.0% [35] 864(2.1%) 0(0.0%) for-loop ...ck/herbie/src/core/simplify.rkt:136:10 substitute-e [41] 51.2% merge-egraph-nodes! [39] 25.5% loop! [69] 23.4% ----------------------------------------------------------------------- for-loop [31] 100.0% [36] 604(1.5%) 0(0.0%) atab-add-altn ...rbie/src/core/alt-table.rkt:208:0 best-and-tied-at-points [42] 66.9% loop [45] 33.1% ----------------------------------------------------------------------- taylor-alt [32] 100.0% [37] 204(0.5%) 0(0.0%) for-loop /home/ztatlock/herbie/src/glue.rkt:144:2 location-do [44] 100.0% ----------------------------------------------------------------------- loop [33] 100.0% [38] 12912(31.2%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:93:2 loop [47] 57.5% make-exacts* [46] 41.0% eval-prog [55] 1.5% ----------------------------------------------------------------------- merge-egraph-nodes! [39] 5.4% for-loop [35] 9.8% apply-match [30] 84.9% [39] 2252(5.4%) 0(0.0%) merge-egraph-nodes! ...e/src/core/egraph.rkt:152:0 update-leader! [48] 64.3% loop! [69] 20.6% for-loop [51] 9.8% merge-egraph-nodes! [39] 5.4% ----------------------------------------------------------------------- match-e [34] 100.0% [40] 844(2.0%) 442(1.1%) for-loop ...tlock/herbie/src/core/ematch.rkt:59:11 for-loop [49] 62.0% ----------------------------------------------------------------------- apply-match [30] 31.4% for-loop [35] 68.6% [41] 644(1.6%) 202(0.5%) substitute-e ...ck/herbie/src/core/ematch.rkt:71:0 mk-enode! [50] 68.6% ----------------------------------------------------------------------- atab-add-altn [36] 100.0% [42] 404(1.0%) 0(0.0%) best-and-tied-at-points ...ore/alt-table.rkt:122:0 for-loop [53] 50.0% errors [54] 50.0% ----------------------------------------------------------------------- match-e [34] 100.0% [43] 220(0.5%) 220(0.5%) list-cartesian-product ...src/core/ematch.rkt:20:0 ----------------------------------------------------------------------- for-loop [37] 100.0% [44] 204(0.5%) 0(0.0%) location-do ...tlock/herbie/src/programs.rkt:129:0 approximate9 [52] 100.0% ----------------------------------------------------------------------- atab-add-altn [36] 100.0% [45] 200(0.5%) 0(0.0%) loop ...atlock/herbie/src/core/alt-table.rkt:182:2 loop [64] 100.0% ----------------------------------------------------------------------- loop [38] 22.9% loop [33] 77.1% [46] 23104(55.8%) 0(0.0%) make-exacts* ...tatlock/herbie/src/points.rkt:80:0 map [56] 51.1% loop [64] 48.9% ----------------------------------------------------------------------- loop [33] 5.5% loop [38] 94.5% [47] 7860(19.0%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:83:4 map [56] 100.0% ----------------------------------------------------------------------- apply-match [30] 20.5% merge-egraph-nodes! [39] 79.5% [48] 1972(4.8%) 0(0.0%) update-leader! ...herbie/src/core/egraph.rkt:217:0 for-loop [57] 89.8% custom-set-union! [61] 10.2% ----------------------------------------------------------------------- match-e [34] 25.6% for-loop [40] 74.4% [49] 866(2.1%) 0(0.0%) for-loop ...tlock/herbie/src/core/ematch.rkt:65:37 match-e [34] 76.9% ??? [63] 23.1% ----------------------------------------------------------------------- expr->enode [22] 33.4% substitute-e [41] 66.6% [50] 664(1.6%) 202(0.5%) mk-enode! ...lock/herbie/src/core/egraph.rkt:101:0 hash-has-key? [58] 69.6% ----------------------------------------------------------------------- merge-egraph-nodes! [39] 100.0% [51] 220(0.5%) 0(0.0%) for-loop ...tlock/herbie/src/core/egraph.rkt:232:6 update-en-expr [90] 100.0% ----------------------------------------------------------------------- location-do [44] 100.0% [52] 204(0.5%) 0(0.0%) approximate9 ...ck/herbie/src/core/taylor.rkt:11:0 loop [59] 100.0% ----------------------------------------------------------------------- best-and-tied-at-points [42] 100.0% [53] 202(0.5%) 0(0.0%) for-loop ...k/herbie/src/core/alt-table.rkt:124:16 ??? [60] 100.0% ----------------------------------------------------------------------- best-and-tied-at-points [42] 100.0% [54] 202(0.5%) 0(0.0%) errors /home/ztatlock/herbie/src/points.rkt:144:0 for-loop [62] 100.0% ----------------------------------------------------------------------- loop [38] 100.0% [55] 192(0.5%) 0(0.0%) eval-prog ...tatlock/herbie/src/programs.rkt:162:0 hash-ref! [77] 100.0% ----------------------------------------------------------------------- parse-loop12 [91] 1.0% f6 [4] 2.1% loop [47] 38.7% make-exacts* [46] 58.2% [56] 20300(49.0%) 0(0.0%) map ...acket/collects/racket/private/map.rkt:21:13 loop [64] 98.9% ??? [89] 1.1% ----------------------------------------------------------------------- update-leader! [48] 100.0% [57] 1770(4.3%) 222(0.5%) for-loop ...tlock/herbie/src/core/egraph.rkt:222:6 for-loop [65] 87.5% ----------------------------------------------------------------------- mk-enode! [50] 100.0% [58] 462(1.1%) 462(1.1%) hash-has-key? ...et/private/more-scheme.rkt:368:13 ----------------------------------------------------------------------- approximate9 [52] 100.0% [59] 204(0.5%) 0(0.0%) loop ...e/ztatlock/herbie/src/core/taylor.rkt:82:4 hash-ref! [77] 100.0% ----------------------------------------------------------------------- for-loop [53] 100.0% [60] 202(0.5%) 202(0.5%) ??? ...ket/collects/racket/private/for.rkt:1150:14 ----------------------------------------------------------------------- update-leader! [48] 100.0% [61] 202(0.5%) 0(0.0%) custom-set-union! ...t/private/set-types.rkt:246:0 for-loop [66] 100.0% ----------------------------------------------------------------------- errors [54] 100.0% [62] 202(0.5%) 0(0.0%) for-loop ...e/ztatlock/herbie/src/points.rkt:147:4 ??? [67] 100.0% ----------------------------------------------------------------------- for-loop [49] 100.0% [63] 200(0.5%) 200(0.5%) ??? /home/ztatlock/herbie/src/core/ematch.rkt:50:5 ----------------------------------------------------------------------- loop [45] 0.0% make-exacts* [46] 0.3% loop! [69] 0.5% ??? [6] 0.6% parse-loop12 [91] 0.7% map-enodes [20] 0.7% extract-alt [15] 0.8% map [56] 1.2% loop [64] 95.2% [64] 33702(81.4%) 0(0.0%) loop ...cket/collects/racket/private/map.rkt:26:19 loop [64] 95.2% ??? [67] 0.9% simplify [3] 0.8% for-loop [71] 0.7% ??? [72] 0.7% parse-loop12 [91] 0.6% hash-ref! [77] 0.6% loop! [69] 0.5% ??? [73] 0.0% ??? [89] 0.0% ->flonum [70] 0.0% ----------------------------------------------------------------------- for-loop [57] 100.0% [65] 1548(3.7%) 200(0.5%) for-loop ...tlock/herbie/src/core/egraph.rkt:223:8 hash-update! [68] 87.1% ----------------------------------------------------------------------- custom-set-union! [61] 100.0% [66] 202(0.5%) 202(0.5%) for-loop ...cts/racket/private/set-types.rkt:254:4 ----------------------------------------------------------------------- for-loop [62] 0.7% loop [64] 99.3% [67] 30924(74.7%) 682(1.6%) ??? /home/ztatlock/herbie/src/programs.rkt:168:4 ??? [74] 93.3% real->bigfloat [75] 4.5% ----------------------------------------------------------------------- for-loop [65] 100.0% [68] 1348(3.3%) 0(0.0%) hash-update! ...ket/private/more-scheme.rkt:362:13 ??? [76] 100.0% ----------------------------------------------------------------------- for-loop [35] 9.3% apply-match [30] 19.4% loop [64] 28.7% merge-egraph-nodes! [39] 42.6% [69] 1088(2.6%) 220(0.5%) loop! .../ztatlock/herbie/src/core/enode.rkt:163:2 set [78] 37.1% loop [64] 28.7% custom-set-union [79] 24.1% ----------------------------------------------------------------------- loop [64] 100.0% [70] 464(1.1%) 0(0.0%) ->flonum ...ock/herbie/src/syntax/syntax.rkt:224:0 ??? [98] 100.0% ----------------------------------------------------------------------- loop [64] 100.0% [71] 462(1.1%) 240(0.6%) for-loop ...ock/herbie/src/core/simplify.rkt:161:2 eval-const-expr [80] 48.1% ----------------------------------------------------------------------- loop [64] 100.0% [72] 430(1.0%) 0(0.0%) ??? ...ket/collects/racket/private/list.rkt:323:18 hash-ref! [77] 100.0% ----------------------------------------------------------------------- loop [64] 100.0% [73] 200(0.5%) 0(0.0%) ??? ...atlock/herbie/src/core/alt-table.rkt:199:30 loop [81] 100.0% ----------------------------------------------------------------------- ??? [67] 100.0% [74] 28846(69.6%) 0(0.0%) ??? ...acket/collects/racket/private/kw.rkt:400:14 ??? [89] 93.2% bf* [82] 5.3% ...higher-order.rkt:373:33 [84] 1.5% ----------------------------------------------------------------------- ??? [67] 100.0% [75] 1396(3.4%) 1156(2.8%) real->bigfloat .../private/bigfloat/mpfr.rkt:451:0 ??? [99] 17.2% ----------------------------------------------------------------------- hash-update! [68] 100.0% [76] 1348(3.3%) 202(0.5%) ??? .../ztatlock/herbie/src/core/egraph.rkt:225:24 for-loop [83] 85.0% ----------------------------------------------------------------------- eval-prog [55] 7.7% for-loop [12] 8.2% ??? [87] 8.2% loop [59] 8.2% loop [64] 15.5% localize-error [21] 21.6% ??? [72] 30.5% [77] 826(2.0%) 0(0.0%) hash-ref! ...racket/private/more-scheme.rkt:373:13 parse-loop12 [91] 30.5% f6 [4] 21.6% ??? [6] 15.5% ??? [87] 8.2% ??? [5] 8.2% simplify [86] 8.2% bigfloat-hash [88] 7.7% ----------------------------------------------------------------------- loop! [69] 100.0% [78] 606(1.5%) 606(1.5%) set ...collects/racket/private/set-types.rkt:982:0 ----------------------------------------------------------------------- loop! [69] 100.0% [79] 262(0.6%) 0(0.0%) custom-set-union ...et/private/set-types.rkt:168:0 for-loop [85] 100.0% ----------------------------------------------------------------------- for-loop [71] 100.0% [80] 222(0.5%) 222(0.5%) eval-const-expr ...k/herbie/src/programs.rkt:180:0 ----------------------------------------------------------------------- ??? [73] 16.7% loop [81] 83.3% [81] 200(0.5%) 200(0.5%) loop ...ket/collects/racket/private/list.rkt:82:16 loop [81] 83.3% ----------------------------------------------------------------------- ??? [74] 100.0% [82] 1538(3.7%) 0(0.0%) bf* ...ath/private/bigfloat/bigfloat-mpfr.rkt:95:0 ??? [89] 100.0% ----------------------------------------------------------------------- ??? [76] 100.0% [83] 1146(2.8%) 722(1.7%) for-loop ...lock/herbie/src/core/egraph.rkt:226:26 update-en-expr [90] 37.0% ----------------------------------------------------------------------- ??? [74] 100.0% [84] 436(1.1%) 0(0.0%) ...higher-order.rkt:373:33 (unknown source) ??? [97] 53.7% ??? [93] 46.3% ----------------------------------------------------------------------- custom-set-union [79] 100.0% [85] 262(0.6%) 0(0.0%) for-loop ...cts/racket/private/set-types.rkt:174:3 for-loop [92] 100.0% ----------------------------------------------------------------------- hash-ref! [77] 100.0% [86] 204(0.5%) 0(0.0%) simplify ...atlock/herbie/src/core/reduce.rkt:18:0 parse-loop12 [91] 100.0% ----------------------------------------------------------------------- hash-ref! [77] 100.0% [87] 204(0.5%) 0(0.0%) ??? ...e/ztatlock/herbie/src/core/taylor.rkt:42:15 hash-ref! [77] 100.0% ----------------------------------------------------------------------- hash-ref! [77] 100.0% [88] 192(0.5%) 0(0.0%) bigfloat-hash ...h/private/bigfloat/mpfr.rkt:165:0 sig+exp->bigfloat [94] 100.0% ----------------------------------------------------------------------- loop [64] 0.7% map [56] 0.8% bf* [82] 5.3% ??? [74] 93.2% [89] 28840(69.6%) 24700(59.6%) ??? ...-racket/utils/simple-result-arrow.rkt:26:12 bfmul [95] 5.8% ??? [98] 4.7% bfcos [96] 3.8% ----------------------------------------------------------------------- for-loop [51] 34.2% for-loop [83] 65.8% [90] 644(1.6%) 644(1.6%) update-en-expr ...herbie/src/core/egraph.rkt:211:0 ----------------------------------------------------------------------- parse-loop12 [91] 10.7% loop [64] 10.7% simplify [86] 10.7% hash-ref! [77] 67.8% [91] 634(1.5%) 204(0.5%) parse-loop12 ...s/racket/match/compiler.rkt:410:15 loop [64] 67.8% map [56] 10.7% parse-loop12 [91] 10.7% ----------------------------------------------------------------------- for-loop [85] 100.0% [92] 262(0.6%) 262(0.6%) for-loop ...cts/racket/private/set-types.rkt:178:5 ----------------------------------------------------------------------- ...higher-order.rkt:373:33 [84]100.0% [93] 202(0.5%) 0(0.0%) ??? ...cts/racket/contract/private/list.rkt:187:10 ??? [97] 100.0% ----------------------------------------------------------------------- bigfloat-hash [88] 100.0% [94] 192(0.5%) 192(0.5%) sig+exp->bigfloat ...ivate/bigfloat/mpfr.rkt:385:0 ----------------------------------------------------------------------- ??? [89] 100.0% [95] 1684(4.1%) 1004(2.4%) bfmul ...-lib/math/private/bigfloat/mpfr.rkt:819:4 ??? [99] 40.4% ----------------------------------------------------------------------- ??? [89] 100.0% [96] 1092(2.6%) 892(2.2%) bfcos ...-lib/math/private/bigfloat/mpfr.rkt:616:4 ??? [99] 18.3% ----------------------------------------------------------------------- ??? [93] 46.3% ...higher-order.rkt:373:33 [84] 53.7% [97] 436(1.1%) 0(0.0%) ??? ...ects/racket/contract/private/guts.rkt:638:8 ??? [98] 100.0% ----------------------------------------------------------------------- ??? [97] 19.3% ->flonum [70] 20.5% ??? [89] 60.2% [98] 2264(5.5%) 942(2.3%) ??? ...tract/private/arrow-higher-order.rkt:373:33 ??? [100] 37.5% ??? [101] 20.9% ----------------------------------------------------------------------- bfcos [96] 17.9% real->bigfloat [75] 21.4% bfmul [95] 60.7% [99] 1120(2.7%) 1120(2.7%) ??? .../share/racket/collects/ffi/unsafe.rkt:861:4 ----------------------------------------------------------------------- ??? [98] 100.0% [100] 848(2.0%) 424(1.0%) ??? ...llects/racket/contract/combinator.rkt:178:4 any-wrap/traverse [102] 50.0% ----------------------------------------------------------------------- ??? [98] 100.0% [101] 474(1.1%) 474(1.1%) ??? ...ects/racket/contract/private/prop.rkt:489:4 ----------------------------------------------------------------------- ??? [100] 100.0% [102] 424(1.0%) 424(1.0%) any-wrap/traverse ...cket/utils/any-wrap.rkt:106:2 -----------------------------------------------------------------------